At one point, I was working on what I thought was going to be a "double opt-in only" (enter address on web, get message, click link, or we don't send anything else), fairly reputable mailing list management site.
Since there were several different companies involved, we needed the option of opting out of a) one list, b) all lists for one company, or c) all lists we had anything to do with. Doing b or c would prevent future list subscriptions by any party.
Kinda like the dma lists, except the company would never see any users who unsubscribed; the address would just vanish from their database views. It would, however, stay in ours so we could know who to keep out of that view.
Explaining to these companies that we were actually enforcing all the privacy policies that they claimed to adhere to didn't go over well, though, as you might imagine. |