I recently had a pretty crappy experience with 1-800-FLOWERS.com. The details aren't really relevant; suffice to say that I'll never be ordering from them again. You'd think it would have occurred to somebody that they probably shouldn't keep me on their mailing list, but that's probably assuming too much intelligence on their part.
I finally got around to hitting the Unsubscribe link on one of their thrice-weekly emails (I know, I know, you're not supposed to do that since it just tells spammers that your email is a live one, but since I'd actually ordered from them it wasn't spam per se). The next page was another website, probably their email list manager (cheetahmail, maybe?), confirming that they'd removed me from their list and asking me to provide the reason why I was unsubscribing.
First, any data they get from this will be useless since the only choices are "I get too much email from 1-800-etc" and "I'm not interested in getting email from 1-800-whatever," and since it's a radio button with no "decline to answer" option, most people aren't going to care enough to do anything beyond hit Submit with whatever option was selected as default.
Second, after hitting Submit, you're forwarded to 1-800-dipshits' main page. Why would I want to go there if I'd just unsubscribed from their mailing list? I just expressed a desire to make them stop trying to sell me flowers; why would I want to go to their main page, the only purpose of which is to try to sell me flowers?