drive-by posts of mainly memes and Tweets ... by @Yuritopiaposadism@hexbear.net ... (and they don't seem to engage with the comments on many of these very active posts they make despite also being a prolific commenter on this site)

I think Yuritopia just cross-posts things Yuritopia finds interesting from off the site and doesn't want to bother arguing in the comments when some of those things end up being a bit controversial. I don't think it's meant to be bait or anything like that.

Yuritopia has 1k comments and 17k posts, so I wouldn't say Yuritopia is a prolific commenter necessarily.