Airtexting: a heckler's dream-feature

Joi Ito has a good blog entry about Nokia's new "Airtexting" feature in the 3220 handsets: a string of LEDs down the side of the phone spell out user-defined words when the phone is waved back and forth. Joi ponders the heckling applications:
If they made an airtexting enabled BlackBerry, I wonder if they would allow them in Congress. With the massive penetration of BlackBerries, it would be like a chorus of Hecklebots. Anyway, I want one. Forget night clubs, imaging having one in the audience during talks.