Telefun and Games
Junkbusters, an organization devoted to helping people eliminate junk mail and messages from their lives -- telemarketing calls, spam, Web ads -- offers an anti-telemarketing script that you can use to gather information about telemarketers who call you, request that they not call you again, and learn what you need to know if you decide to pursue legal action against telemarketers.

The script identifies what questions might be grounds for legal action if the telemarketer responds negatively, and the script is separated into two sections, the first of which is pretty general. "If you feel like making them pay, keep going."

Thanks to Utne Web Watch.