Personally I would keep my nose out of other people's business...especially if you and he had a falling out....it could very much make you look like the bad guy trying to seek vengeance on someone you are no longer friendly with.
If they are on FB with pictures then obviously they have accepted the risks of law enforcement seeing the photos and taking action.
Are they allowed with state/ federal permits in NY? Maybe the dude has the correct permits or has been grandfather claused in? (kinda hard to fill in the blanks without knowing more about the person with the snakes and the state laws).