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!
People who complain about ads on YouTube. I tell them about ads blockers and they always go “Huh, you sure it works? Sounds good, I might try that” and then proceed to forget about it and complain about ads in a few months time…