Illegal aliens are illegal for a reason. They're criminals, losers, con artists, scammers, pedophiles, rapists, drug runners, gang-bangers, thieves, sex traders, porn operators, killers, murderers, drunks, dopers, radicals, socialists, crazies, moochers, beggars, etc., etc., etc.

Normal people do not break into other countries or over-stay their visas. They just don't.