• “/s”
• “SLAMS!”
• “Neckbeard” or “fedora” etc. Grow the fuck up.
• Groupthink.
• Low-effort shitposts.
• Obvious propaganda.
• Arbitrary removal of comments.
• Copious white knight bullshit.
• Downvotes for facts that go against the zeitgeist.

Just off the top of my head.