Have You Heard of This?

Have you heard of a spoof card? Apparently it's a calling card that allows you to change what someone sees on their caller ID display when they get a phone call, record calls and change your voice. Honestly, it sounds a little creepy to me. I don't know why my first thought was that strange perverted people would want to use this but it was. I suppose it could be beneficial to people that aren't strange and perverted. This could be the ultimate prank calling tool. Not sure I understand how it could help the average person.
If you want to check it out go to
SpoofCard.com. They claim this is a totally legal service.