Why do people keep saying fence? No domicile has been fenced the past 10 yrs in binding arbitration that I can think of? Arbitrators make fences to protect large equipment flying for a certain airline. For example, a 5-yr fence for NWA 747s and Delta 777s. With the definition of career expectations and domestic narrowbody flying at both airlines, you shouldn't worry on fences. Training cost associated with cross-bidding is a company thing.

Bottom line, if you want a job at Alaska and even if you live in an Alaska base and Virgin calls first, take it.