"Based on my limited experience on the blockchain, I will go with the word "absurd". A great deal of them can be found under the #introduceyourself tag in the form of perpetual greeters using the SAME EXACT MESSAGES over and over."

This seems like most of it to me - aside from those various obvious "Wow this is such a great article" comments. I know that we all want to greet people using the #introduceyourself tag...but I feel like the bots that automatically upvote those posts need to stop. I see value in those upvotes/comments in that they might encourage people to stay longer, but I don't know if they are even very effective at that. I think we are mostly just allowing spammers to keep on going.