[vinylweatherman]

Chargebacks would be a drastic step to take, but as this situation continues, especially where casinos hide the true nature of the dificulties they are having in paying out from deposits, there could come a time where the US players decide that they are getting nowhere, and a situation may develop where the US banks and/or legal advisors start advising players that their actions were illegal all along, and they should unwind their position by cancelling all deposits.
This could hurt the industry if the US allows the cancellation of deposits from way back, where withdrawals have already been paid. Such a scenario will effectively kill 9off the entire industry as it would not have the funds to pay back, however, the DoJ may see this as a great way to end the problem once and for all, short of arresting execs, money is the next best weapon to employ. They have shown they CAN do this by forcing Neteller to freeze funds of US players, INCLUDING at least one case where the funds had nothing to do with ONLINE gambling.
Players who feel the industry had treated them well will refuse to cooperate in such a move, but players who feel they have been royally screwed over may well decide to quit gambling online altogether, cooperate and not really care than no online casino will ever take their wagers again.

Best thing for casinos to do now is spell out the WORST CASE scenario, not as at present, a schedule for withdrawals which is probably over optimistic.