Ah, I see what you mean. Those are serious-ly malicious bots then! But yeah, completely agreed; those can be a PITA on sites with user-generated content.

But, is your experience that these kinds of bots cause much traffic? Because, from what I've seen, they can make a mess with fake accounts, fake content, fake clicks, etc, but as far as traffic goes, they were completely dwarfed by search engine crawlers and real users' traffic.

Thanks for the clarification :D

Mhm, we have a bunch of non-crawled content that sees a significant minority of request volume from disguised bots. Overall, it is definitely dwarfed by traffic from real users, but it still forces a lot of work to prevent the bots from gaming metrics/analytics.