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I think targeted content is the worst offender. It is responsible for creating the filter bubbles many live in.

There have been stories about how "sane" individuals were slowly radicalized because they only saw a particular perspective of the real world

Social media apps are probably mostly okay, but the recommendation and feed algorithms are likely problematic.

Newspapers, Radio and Television stations also right?

Yes, all "Push" based advertising is harmful.

Push notifications are certainly one.

Addictive gambling like applications and loot boxes in gaming cause some people to kill themselves.