Its all or the spambots. They just go about with their horrible virus worms and create accounts on websites their companies have targeted. Heres how we fix them. Its barely legal, but what we can do is get the spambots to buy stuff. We can sell anything, Heck sell a box of cereal for $5,000. If we can somehow put up a link to the "spam bait? as we will call it" we can make it buy that to create an account. Then the big cell phone company removes our site from their advertising targets. The bad part is that the person selling the "spambot bait" could be subject to legal action and Ive only seen this done succesfully a few times, and only on high traffic popular websites that have awesome lawyers.
You know we could.... Or we could require more information and add some more "spamshields" like the thing where you have the box with letters and you have to type what it looks like.