Many people who place themselves on self-exclusion lists attempt to return to casinos and gamble, in violation of their exclusion agreements, and often in the face of a potential arrest for trespassing. In the absence of regulatory oversight (or the potential for litigation), casinos would seem to have a profit incentive to turn a blind eye to these transgressions by some of their best, albeit excluded, customers. But there generally is such regulatory oversight, as Philadelphia's SugerHouse Casino found out in December, 2012, when it agreed to a $10,000 fine, in part for allowing a self-excluded gambler to gamble in its casino -- twice, with the second occasion involving a nearly four-day marathon session. The same fellow came back in February, 2013, and was uncovered by the casino as being on the excluded list as he was approaching three full days (including a nap in his car) of another protracted betting fest. Apparently he never gambled in one spot for very long, but still.... More details here and here.