And undoubtedly not kosher for the linux-oriented folks that seem to dominate here, but there's a sonderful little program called Cookie Pal for windows systems that can not only block cookies in the two big boy browsers, it also handles most versions of Opera (no support exists yet for Complicator 6 or, i suspect, Opera 4) and as a bonus, it handles all of the IE shell integrations, which Outlook, Outlook Express (the most common mail reader... ugh) and Eudora use for HTML mail reading...
The thing is, it's all well and good to eliminate HTML mail, but more than a few of us like receiving that sort of thing - i know i like my newletters with links in them - saves me a step between seeing a concept, and acquiring more info on it.
So there are ways.
i'd link to the program, but i'll be damned if i can remember where i got it... And it IS shareware. So use only if you want to pay.
If we demand from them without offering in return, what are we but better-
dressed muggers holding up the creative at the point of a metaphorical gun?