AT&T/iPhone question

So a friend sends me a youtube video about this girl who gets her first bill from AT&T after having her iPhone for a month. The gist is that she has unlimited text messages and apparently she takes advantage of it. AT&T actually sends her bill to her in a box and the video claims that her bill is 300 pages long because each one of her messages is itemized. The video is pretty stupid, but the idea that you can actually have 300 pages of itemized text messages in 1 month is hilarious to me.
http://www.youtube.com/watch?v=J4cxpGRWX1s

Okay, I just watched it again and I found out that it might be a commercial or something. Still, it is a funny idea.

Bernie