For me it’s the paranoia surrounding webcams. People outright refuse to own one and I understand, until they go on and on about how they’re being spied. Here’s the secret - unplug the damn thing when you think you won’t use it or haven’t used it in a while.
They, whoever it is, can’t really spy on you on something that’s already off and unplugged!
I think this happens because people believe that ad blockers are “too good to be true”. That was what I first thought when first getting an ad blocker, that there was going to be some kind of “catch” like slowing down websites, making them less functional or being malicious. But it turns out they actually improve performance, rarely affect functionality and are even recommended by the FBI because they protect against malicious advertising.