NY Giants great Lawrence Taylor was in a North Jersey hotel room when he called for a hooker. He was told she was 19, she turned out to be 16, and LT was up on all kinds of charges. He cooperated w/ the prosecution of the pimp, so he got probation and fines, and doesn't have to register. That happens to a regular dude, w/o high dollar lawyers and PR machine, you gettin locked up.

Hence the term LTed, or LT'd.