diff --git a/sample/src/componentA/fence.json b/sample/src/componentA/fence.json
index c0ba3e2..a747ef2 100644
--- a/sample/src/componentA/fence.json
+++ b/sample/src/componentA/fence.json
@@ -2,5 +2,6 @@
     "tags": [ "tagA" ],
     "exports": {
         "componentA": "*"
-    }
+    },
+    "imports":[]
 }
\ No newline at end of file
diff --git a/src/core/cli.ts b/src/core/cli.ts
index c561dbe..3a5ebcc 100644
--- a/src/core/cli.ts
+++ b/src/core/cli.ts
@@ -17,8 +17,8 @@ let hadError = false;
 // Run good-fences
 run({
     ...options,
-    onError(message) {
-        console.error(`Error: ${message}`);
+    onError(error) {
+        console.error(error.detailedMessage);
         hadError = true;
     },
 });
diff --git a/src/core/reportError.ts b/src/core/reportError.ts
index 229fc44..eb78ede 100644
--- a/src/core/reportError.ts
+++ b/src/core/reportError.ts
@@ -1,7 +1,27 @@
+import * as path from 'path';
 import getOptions from '../utils/getOptions';
+import Config from '../types/Config';
+
+export default function reportError(
+    message: string,
+    sourceFile: string,
+    rawImport: string,
+    config: Config
+) {
+    let fencePath = config.path + path.sep + 'fence.json';
+
+    let detailedMessage =
+        `Good-fences violation in ${sourceFile}:\n` +
+        `    ${message}: ${rawImport}\n` +
+        `    Fence: ${fencePath}`;
 
-export default function reportError(message: string) {
     if (getOptions().onError) {
-        getOptions().onError(message);
+        getOptions().onError({
+            message,
+            sourceFile,
+            rawImport,
+            fencePath,
+            detailedMessage,
+        });
     }
 }
diff --git a/src/types/NormalizedOptions.ts b/src/types/NormalizedOptions.ts
index eb3eb7c..d8afee0 100644
--- a/src/types/NormalizedOptions.ts
+++ b/src/types/NormalizedOptions.ts
@@ -1,7 +1,9 @@
 import NormalizedPath from './NormalizedPath';
+import ValidationError from './ValidationError';
 
 export default interface NormalizedOptions {
     project: NormalizedPath;
     rootDir: NormalizedPath;
-    onError?: (message: string) => void;
+    ignoreExternalFences: boolean;
+    onError?: (error: ValidationError) => void;
 };
diff --git a/src/types/Options.ts b/src/types/Options.ts
index 7788d3a..268c8f8 100644
--- a/src/types/Options.ts
+++ b/src/types/Options.ts
@@ -1,5 +1,8 @@
+import ValidationError from './ValidationError';
+
 export default interface Options {
     project?: string;
     rootDir?: string;
-    onError?: (message: string) => void;
+    ignoreExternalFences?: boolean;
+    onError?: (error: ValidationError) => void;
 };
diff --git a/src/types/ValidationError.ts b/src/types/ValidationError.ts
new file mode 100644
index 0000000..c887039
--- /dev/null
+++ b/src/types/ValidationError.ts
@@ -0,0 +1,7 @@
+export default interface ValidationError {
+    message: string;
+    sourceFile: string;
+    rawImport: string;
+    fencePath: string;
+    detailedMessage: string;
+};
diff --git a/src/utils/getAllConfigs.ts b/src/utils/getAllConfigs.ts
index 580ab06..5a558a8 100644
--- a/src/utils/getAllConfigs.ts
+++ b/src/utils/getAllConfigs.ts
@@ -13,6 +13,11 @@ export default function getAllConfigs(): ConfigSet {
 
         // Glob for configs under the project root directory
         let files = glob.sync(normalizePath(getOptions().rootDir, '**/fence.json'));
+        
+        if (getOptions().ignoreExternalFences) {
+            files = files.filter(f => f.split(path.sep).indexOf('node_modules') > -1);
+        }
+
         files.forEach(file => {
             let configPath = normalizePath(path.dirname(file));
             configSet[configPath] = JSON.parse(fs.readFileSync(file).toString());
diff --git a/src/utils/getOptions.ts b/src/utils/getOptions.ts
index 89edbf1..9d1c8eb 100644
--- a/src/utils/getOptions.ts
+++ b/src/utils/getOptions.ts
@@ -18,6 +18,7 @@ export function setOptions(providedOptions: Options) {
     options = {
         project,
         rootDir,
+        ignoreExternalFences: providedOptions.ignoreExternalFences,
         onError: providedOptions.onError,
     };
 }
diff --git a/src/validation/validateDependencyRules.ts b/src/validation/validateDependencyRules.ts
index 3392b80..d69303c 100644
--- a/src/validation/validateDependencyRules.ts
+++ b/src/validation/validateDependencyRules.ts
@@ -43,7 +43,7 @@ function validateConfig(config: Config, sourceFile: NormalizedPath, importRecord
     }
 
     // If we made it here, we didn't find a rule that allows the dependency
-    reportError(`${sourceFile} is not allowed to import '${importRecord.rawImport}'`);
+    reportError('Dependency is not allowed', sourceFile, importRecord.rawImport, config);
 }
 
 function getFullDependencyRule(dependency: DependencyRule): FullDependencyRule {
diff --git a/src/validation/validateExportRules.ts b/src/validation/validateExportRules.ts
index 25709ab..6cde884 100644
--- a/src/validation/validateExportRules.ts
+++ b/src/validation/validateExportRules.ts
@@ -33,7 +33,7 @@ function validateConfig(config: Config, sourceFile: NormalizedPath, importFile:
     }
 
     // If we made it here, the import is invalid
-    reportError(`${sourceFile} is importing inaccessible module ${importFile}`);
+    reportError('Module is not exported', sourceFile, importFile, config);
 }
 
 function hasMatchingExport(config: Config, sourceFile: NormalizedPath, importFile: NormalizedPath) {
diff --git a/src/validation/validateImportRules.ts b/src/validation/validateImportRules.ts
index 6c5bd7d..1361b05 100644
--- a/src/validation/validateImportRules.ts
+++ b/src/validation/validateImportRules.ts
@@ -39,5 +39,5 @@ function validateConfig(config: Config, sourceFile: NormalizedPath, importRecord
     }
 
     // If we made it here, the import is invalid
-    reportError(`${sourceFile} is not allowed to import '${importRecord.rawImport}'`);
+    reportError('Import not allowed', sourceFile, importRecord.rawImport, config);
 }
diff --git a/tsconfig.json b/tsconfig.json
index bf01d69..cf7235e 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -6,7 +6,8 @@
         "sourceMap": false,
         "outDir": "lib",
         "noImplicitAny": true,
-        "noUnusedLocals": true
+        "noUnusedLocals": true,
+        "noImplicitThis": true
     },
     "exclude": [
         "node_modules",