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!
An ad blocker, on desktop and phone.
It blocks annoying ads and also protects you against malware (malvertisement).
I set up my Pi-Hole years ago and haven’t touched it since. Maybe I should update it.
And please just enable blocking cookies and annoyances in unlock origin. It has filters that can be enabled, and you’ll never see a cookie banner again.