This is ridiculous. I've only been turking for a couple of months (actually today is my two month anniversary), but I find it so hard to believe that a gigantic, well respected company like Amazon doesn't have a better system in place for Mturk.Yup. Exactly.
There is a severe lack of controls. At the very, very least, there should be a system in place to dispute a block or a ban with both sides submitting their sides of their story. It's a joke that Amazon doesn't look at a user's history and/or percentage rating before blocking someone's only source of income. link
A spot-on commentary: