Is the same thing going on, south of the border?
Over the last couple of years we've seen an explosion of telemarketing calls from a company calling itself "Air Duct Cleaning." I was home sick, one day last week, and had to get out of bed 4 times to answer calls from these assholes. If you opt for the cleaning then some knuckle dragger shows up at your door, blows the dust out of your heating vents and all over your house, then charges you $75.00 for the privilege.
In Canada we have a national "do not call list." Companies that are in breach of it are supposed to receive legal sanctions from the CRTC (our equivalent to your FCC). Thing is that these assholes are in Karachi, Pakistan and using IP phones, so tracking them down and sanctioning them is a virtual impossibility.
Unless you're a TV news and information programme, apparently.
http://www.cbc.ca/marketplace/episod...emarketer.html
http://www.cbc.ca/marketplace/episod...-knocks-3.html