The gnomes, they are stealing my underwear.

It's hilarious that people think that posting a statement like this on a PUBLIC forum is any sort of legality. When it comes to photos that is a given. A photo is "copyrighted" as soon as it is taken. It is owned by the photographer unless rights are sold or permission is given. People can still use photos, as long as it is not used to make money.

As for everything else, nothing about this forum is private. Anything you say CAN be used against you.