The web can be scary without adblocker. Many people have given similar examples here lately. Here's one from me:

I have a certain addiction I cannot control. Tried everything possible without any success at all. It's not as dangerous as drugs, but it's also related to buying a lot of expensive stuff. So, when I disable adblock, every website spams the hell out of me with ads related to my addiction.

This is nasty! And disgusting. I'm sure I'm not alone. Also there's probably a huge number of people that get influenced to smaller extent and don't pay attention to it (because it doesn't ruin their lives, y'know).