There's an awful lot of scams going on, and I'd love to report them, but it seems that none of the big players (looking at you, Facebook, Twitter, Youtube) have a way to report external websites that are claiming to be these guys.
For instance, I just saw a website that pretends to be youtbe, presents a fake captcha, and the submit button triggers you clicking "like" which ends up posting it to your wall.
I could report to imgur, which was hosting the images... but facebook didn't seem to have anything to send this to, neither did youtube. I don't run into spam every day, but when I do I'd sure like to help people get away from it.
What should I do? Sitting on my hands is not an option.