AT&T's Mysterious "Mobile Purchases & Downloads Charges"

Could it be that a devious developer allocated the keyword "STOP" to mean "confirm my subscription" in hope of confusing the annoyed and disinterested ?

Or worse, maybe any reply can be designated to indicate a confirmation; I'm not interested enough to research it right now...

Interesting post from 2007 :-(

http://classactionconnect.com/cell_phone_issues/2007/08/31/c...