Whenever I do online dating, I always practice due diligence, and heed red flags. If someone sends a picture that looks like a model shoot, RED FLAG. (One person sent me a picture that was clearly a shot of a B/C-list celebrity). So many of the victims, like the girl above, don't even do the bare minimum (Lanum: "You're beautiful!"; Ari: *Smiley emoticon* Sends a nude pic).
I think that internet scam spotting should be a mandatory course for people in junior high on up.