I am on the do not call list. Robo-dialed call was supposedly from Microsoft Windows. I did not let them go on, just insulted the caller for being part of a scam and hung up on her. Surprisingly, she called back and allowed me to express more of my heartfelt thoughts about what I thought about her mother and how she should have aborted her.
If u fill out any kind of entry form or such on line their terms and conditions probably state that they will call you, as soon as you click I have read and accept the terms it is on! They can call and their cohorts can call and it's 100% legal. Sucks!!!
Which is why you don't fill out those forms, because they never give anything away to begin with, and if you do, you read and comprehend the whole form including the small print. They do have to put you on their internal do not call list, but probably won't because they are criminals to begin with.