Propaganda affects everyone, not just kids. It even affects people with university studies but who have given up thinking for themselves. The problem is that they authorities are banning websites, while social media is riddled with propaganda. They claim to do something which clearly doesn't work.
The Internet used to be cool in the '90 when it wasn't regulated and Meta, Google and Tiktok didn't exist. Now it's all ads, propaganda and hate speech.
> ads, propaganda and hate speech
Just think about this (which is not 100% correct, but for the sake of discussion): it's probably not meta, google and tiktok. It's the internet peoples who are the source of all that. It's peoples who say hate, who push for ideas they believe in, and they also (surprise!) publish ads! (While google et cetera are just a medium, with lots of moderation, yep.).
It's really the bots and algorithms are the source of all of that, promoting somebody's agenda. Now AI too. Remember, Tay the Microsoft bot that they put on Twitter and it became nazi the next day? It's that multiplied by the number of stars in the visible universe.
The only safer places are heavily moderated hobby related forums with actual people. Anti vaxxing is not a hobby btw.