These drive me nuts when I see them. MTurk's policy states workers shouldn't be asked for personal information: phone number, email, etc. The fact they're asking for one's social security number, or to register with an image hosting site, should easily classify them as against policy. They're obviously from the same person, or a small group of people, since their previews are always formatted exactly the same way. Anyone else peeved with these? I report the hits whenever I see them, but they keep popping back up.
Can't help it. They are like roaches. You squish one, another one emerges from the drain. Luckily for me though, I am not eligible for most of the hits as they require the location to be US. Saves me the trouble.