http://www.arrl.org/news/view/amateur-radio-sleuthing-pins-d...
And “an inventor” who's make shift doorbell was causing problems on 355MHz:
https://hackaday.com/2019/05/15/the-great-ohio-key-fob-myste...
Trouble with these devices is they rely on all applications just transmitting data very briefly. If someone doesn't it can block everything