the UK has this amazing benefit of being an island. how do people get into the UK? through planes? through boats? it's simple. anyone who tries to get into the UK w/o validation is shot on sight. i wouldnt lose any sleep over knowing someone trying to worm their way into my country illegally is shot and killed.
anyone who is asylum seeker/refugee in the country who commits a crime? kill them too. again, i'd lose no sleep if every crime committing refugee/asylum seeker was shot in the head at gun point. in fact my country would probably be better off as a result.