Then there's this. http://www.freerepublic.com/focus/f-news/1173002/posts
Hey, 19 terrorists, 190 terrorits, 1,900 terrrorists, 19,000 terrorist...what's the difference among friends, especially while the cash is flowing...?? /nauseainducingsarcasm
Think about it. The risks are just too great compared to using a visa and entering legally.
By the way, I reported to the FBI a Palestinian posing as a South American who was engaging in very suspicious behavior. But he was here legally, I just accidentally discovered that he was Palestinian, not South American.