If you are sick and tired of telemarketers contacting you about services which you haven't signed up for, you can enter your name and information into a "Do Not Contact" listing.
Follow the link here and add your contact information to have your number removed from most telemarketers lists. The list is provided by the Canadian Marketing Association, a watchdog for the marketing industry.
https://cornerstonewebmedia.com/cma/submit.asp Now, if only we could get the same service for email addresses.