For the most part these are companies that sell the service for them, or are independent installation companies. I have gotten a few calls and am on the do not call list. My biggest complaint with them is Dish Network offers its customers an option to get credits towards your bill by getting your friends and families to join the service. What it must mean to some people is to get an e-mail spammers list and send it to all 500 million of their friends or post it in every newsgroup on the net. Dish Network does not condone this, but they also will very rarely take any action against the person or company that does it.
The only good spammer is a dead one!! Have you hunted one down today? (c) 2006 I Kill Spammers, inc, A Rot in Hell. Co.