If you are a resident alien in Canada and you get a DUI anywhere in the world, your residency can be pulled and you can be barred from ever re-entering the country. Seems like a good idea to follow Canada's example in this one particular case.
Notwithstanding the obvious safety issues with the pilots, it could be argued that the harassed flight attendent was contending with abuse that interfeared with her ability to perform her inflight passenger safety responsibilities.
The little twerp probably donated big money to Obama so the administration will never open any kind of investigation into this reckless incident.