On the topic of fighting shitposts, what I
would love to see is a button that lets
humans (with >= 500 earned merits) mark a post as "redundant":

If it's redundant, why not report it to be deleted?
If 10 unique members is a threshold that's too easy to game, then make it 15...
If it takes 10 or more "hits" to hide a post, I'm not going to waste my time tagging them. It would be much better if it's linked to the Trust list, so based on the user's who's judgement you trust already.
Barely any user has more than 10 negative tags, it's very unlikely a single post will reach that much. Plus, it means at least 10 people have to actually read a redundant post, which is a massive waste of time.