As an owner, I think any kind of "blacklist" is a BAD IDEA. In my case, people rent directly through me, no management co., etc., and I have not had any TERRIBLE experience. The worst thing that has happened was that they stained the blankets (big deal -- a little Clorox) and one group tried to break into the front door (they forgot where the hide-a-key was, I guess). They didn't cause any great damage, just a little spackling. I have appreciated the people that have rented from me each year and hope they come back next year. (Of course, I know who not to invite back if they caused any kind of mess). (Hopefully, the bad renters are few and far between). The good outweighs the bad and I don't want people thinking they are not welcome on 30A.
This is just my experience. I totally understand anyone who has had serious damage to their property. I just don't think this forum is the place for it.