Spread the word about this call-in by asking your friends to register today! When you log in on Friday we'll give you a special number to call. After you've made your call, you can let us know how it went.

I think the email would go something like this:

Dear defectivebydesign Team
I called that fantastic number you supplied me with. I was confronted with a recorded message stating "Welcome to RIAA, DRM department, the person you are looking for is not available at the moment. Please leave a message and he'll/she'll get back to you as soon as possible. Your call is important to us. Have nice day"

How to get a lot of people to sing up to your page:
1) Find a lot of people on the internet
2) Find a cause they all hate
3) Give them a little hope by signing up to your page
4) Sell thier details to the highest bidder for spam production
5) Profit profit profit