How to deal with rote "publication shopping"?
I don't know about any sort of formal blacklist, and it would be a bit hard to deal with because someone may be listed as a coauthor but have so little to do with it being resubmitted that they're truly blameless.  

I've encountered serial submissions before, including cases where a draft is completely unchanged (with ample time between rejection &amp; resubmission).  In some cases these are rejected by the program chair(s) without review and with stern words to the authors similar to what you said: they waste and disrespect the reviewers' efforts.  

Bottom line: Consider a preemptive rejection with the program chair(s) rather than simply repeating your review.  But if that doesn't pull the paper, I would submit a review saying I have reviewed this before, and the paper is unchanged.  Because ignoring past reviews disrespects the efforts of the reviewers, I recommend rejection.