Stiglet:
So if passengers are permitted to claim compensation if the flight runs late will easyjet be able to pass this compensation claim onto the disruptive passenger if he is found guilty?
If compensation was payable (which I'd doubt) then the airline could theoretically "pass on the bill" (I.e. go for a private prosecution to recover the costs), but in practice they'll likely never recover that money even if the case is successful.
You see quite a few cries of "send him the bill!" on PPruNe, usually following a diversion, but it's never quite as simple as that. You can only realistically recover costs if the offender actually has the money or assets to pay you.
We once prosecuted a passenger following a diversion to offload, I think the diversion cost us circa 25k and the offender pays us back around 40 quid a month. You still do it of course because it sends the right message, but don't think that airlines routinely get proper restitution.