Not to mention it's against the law releasing sensitive personal information on the internet without a person's consent; a category into which photographs will fall. Can lead to a pretty hectic lawsuit.
Hotlinking is bad. There was an incident on the NAG forums a few years back where a user posted some pics in a Cute Animal Overdose thread. What he saw was cute kittens. What the rest of the forum saw was Hai2u (warning, absolutely NSFW).
It taught me never to hotlink.




