How best to deal with non paying passengers

What makes you say that? This was an illegal immigrant; note the word illegal. If you or I wanted to move to another country, we’d have to do it properly, or be kicked out. If these people are claiming to be running away from terror, why wouldn’t they be satisfied with simply getting out of the place, rather than going all the way to the UK, where the benefits just happen to be very generous. Same here in Oz where this mob travel thousands of miles to get here for our generous handouts. Still, Suppose he could have been a doctor or a scientist eh.