Ignore by manufacturer data?

[jgbreezer]

Living in a city, in a basement flat below a service business that has tens of people through every day (incl. a waiting room) and a busy street outside, I see tens of apple devices in my bluetooth scans. They still got posted to mqtt by the "APPLEDEVICE" filters (and a couple others I added in) in some previous versions of Theengs Gateway but I think I don't see new ones anymore, and not appearing in homeassistant anyway via that mqtt. I've seen an Oral B toothbrush that wasn't mine and got picked up and added in HA without me choosing to add it from the suggested list, and an interesting (didn't know it existed) Govee BBQ Thermomenter (with"brand": "Govee", "model": "Bluetooth BBQ Thermometer", "model_id": "H5055", "type": "BBQ", and temperatures numbered 5/6 in celsius+fahrenheit and battery level - showed up in mqtt from Theengs).

But I also see this weird thing with manufacturerdata "e8be" followed by 7 more hex digits that vary then the rest of the data is lots of repeated hex byte that I see almost every value for - all the way from 01 up to fc or fd, or so, or beyond (ish). Maybe not every single byte value but like many tens of them. Not a clue what this means and no other data with it except the mqtt mac key (not in the manufacturer data, thats entirely different each time). I don't know how to filter this out, and I feel its clogging up things a bit, although I don't know (I don't think it is) if its making its way into Home Assistant.

Whats the best way to filter out stuff like this/not have it appear in the first place? Turn off discovery? Stop active scanning so much (and btw I'd be quite happy if the active scan was normally quite rare but that H.A. could activate it on a one-off or change the frequency when I wanted it for instance to increase it if someone detected near home by some other means like gps/motion or door sensor) but otherwise run only once every 15 minutes or something.