As many others have mentioned, the "right" thing to do is warn them. Also, if you don't warn them, you are starting to get into "negative option" territory, an

As many others have mentioned, the "right" thing to do is warn them. Also, if you don't warn them, you are starting to get into "negative option" territory, and you need to be careful about how you disclose this to your customers: http://www.responsemagazine.com/direct-response-marketing/legal-review-ftc-sets-new-standards-negative-option-disclosu-4553 http://www.responsemagazine.com/direct-response-marketing/le...