Tribes don't have appropriate ability to self govern, and without it banishment is virtually the only practical solution. If you call the troopers they arrive often days and days later. It's a recipe for lawlessness - yet the state fights sovrenity tooth and nail. Until tribes can govern themselves, or the state adequately does it, banishment will continue and the addicts and criminals from these communities will be forever funneled into Fairbanks and Anchorage.