[dredmorbius]

There used to be a feature rather much like that on the (now defunct) Internet Junkbuster site.

A pretty simple set of form letters you could automatically fill out and have submitted to the major credit bureaus, marketing agencies, and the (then) handful of companies which maintained active marketing lists.

I printed and mailed a small sheaf of letters based on this during the summer of 2001. A month or so later, 9/11 hit, followed by the anthrax mailing scare. I was rather happy to have had far less junk mail to sort through, given the mood of the times -- every piece of mail not received was one more bit of dread avoided.

The results of that persisted for years. I've also avoided using permanent change-of-address forms from the USPS (the data from that is used to, you guessed it, update marketing lists). Having dropped use of credit cards, I've had no credit report for years (occasionally a minor hassle, but actually somewhat nice), and what data does exist is a very jumbled scramble of mostly highly outdated addresses and locations. I prefer it that way.