I have updated the OP with the latest findings. I separated a few accounts as being less likely part of the same group or at least less spammy. I realize it's arbitrary and subjective and perhaps it just looks that way to me because a lot of their posts got reported and deleted by the time I looked at them... but I was mostly concerned about those one-lining idiots who were posting every few minutes.
Having said that, you managed more than one line of vapid generic word salad in some cases so I put you in the less egregious list.
Anyway who care about your list?
If someone do that specially there is no way to stop it, just with a lot of limitation which will never happen as will affect forum to much.
If there is 5 pages of potato posts, why just me or few other profiles should be on your list

(which no one cares about)
Don't get me wrong, but if you want stop the best way is just to close offtopic, did you ask yourself why admins and moderator tolerate this?
Personally I'm person who like to discuss, so if I see some thread interesting to me, and it's open, why I shouldn't post there.
There is a lot of other popular forums which in some way "force" you to post daily, did you ask yourself why?
I don't want to defend spammers but all these what I read here is funny for me.
Anyway good luck to anyone who want stop them.