I do not condone violence or bad behaviour like this by passengers but having been fleeced by Ryanair at check-in in the past I understand their anger and frustration about being relieved of their cash to pay for some jumped-up extra charge. After my experience I have vowed never to fly with Ryanair again. Their modus operandi with regard to pricing is little short of scandalous and has put me off going anywhere near them again. I repeat, I do not condone what these people did but I fully understand it.