Mr Blue - basically in answer to your question about just tossing the free sites - since I work only with partner submitters - I do (and did in this case) send an email to the submitter to let them know for each and every case
I think that it would be tough to say - here's a list - because again a lot of LL owners dont consider copying somebodies recips a "cheating infraction" or they simply dont care as evidenced by their continual listings of sites that do have those recips - and yes these would be LL owners that do know about the occurences and even posted in the threads way back