I added "genuine ones" for a reason. There are lots of trolls, that is for sure. I cannot tell if there are more trolls than genuine ones though.

I have seen bots, too. I remember there was a bot that sent pull requests to over 1000 projects if I remember correctly. All the pull requests involved changing words only, such as "blacklist" to "blocklist" or whatever. You know what is funny? Many of them were merged.