I STAND CORRECTED.
I've checked every single profile on the spreadsheet, and apart from 4-5 low quality posters (but nothing to be shocked about), I didn't find any bad boys.
Looks like a few people, like SomeJasonGuy and Subbir are wearing the signature without actually being accepted in the campaign (am I right, bounty manager?). Which explains my confusion. I suppose they're doing this pro deo. I did not expect them to wear the sig without being mentioned in the spreadsheet.
So I do hope that this campaign manager will accept my apologies.
I don't report campaign spam anymore - at least, I do, but I don't spend hours cleaning up complete threads and profiles anymore. I've got almost 3000 reports now and I'm tired of members and mods having to do other people's dirty work. Some campaign managers simply spit in your face if you send them PM warning them for spammers.