I was involved in the Steem blockchain forum, and after watching how things went during the first year of that project it seemed to me that

a) trolls loved proof of stake because they could use those free tokens to power their mischief and

b) that determined opponents of said trolls could put a serious ding in this mischief

Regarding b, ironically after the troll fell below zero reputation the reputation hiding scheme stopped working, of course, and nobody ever fixed it.

If you know about Steem you know it was the spawn of none other than bytemaster, who satoshi didn't have time for, and that Justin Sun got his crypto millions in a large part off that project and eventually bought it out, and turned it into a farm of koreabots.

All I know is, regarding engagement, that this troll asshat drivechain shill and his socks, or acolytes, or whatever, has pushed me off this site and now I am paying far more attention to Nostr. not that I think I'm really contributing that much but meh, point being that trolls do drive away users.