I don't see why anything should be done to Horatio. He could still be sore from the gunshot wound he suffered earlier in the season, therefore one could conclude that maybe he couldn't have physically done anything to help the guy. If it was someone he cared about it, he'd risk hurting himself... but why would he for a pedophile? And I don't believe its necessarily a 180 on his character. Remember Rio? Not to say that I wouldn't do the same things he did, but I'm just saying. Not necessarily 180.