Jetstar is looking to recover for the cost of the diversion. Given they had several options, did they take the most appropriate option?
If they pursue this and don't reach a settlement I am sure the court will decide whether their course of action was appropriate or not.
Perhaps we should all be sticking up for drunken louts, other passengers and the airline and its crew should just suck it up, and stop being such princesses about it. After all, probably better IFE entertainment than a movie on a tiny screen. Nothing like a bit of real life action and blood to keep things interesting .