] While London's industrial design firm Ideo isn't in the
] business of making ejectable movie theater seats,
] designers at the company have created prototypes for five
] cell phones that enable bystanders to send electric
] shocks, anonymous angry warnings and jarring noises to
] annoying cell-phone users.
] Ideo, which has designed such products as the Palm V
] pocket computer and the TiVo personal video recorder,
] says the public is so irate about inappropriate
] cell-phone use that something has to be done about it.

This is a pretty nutty idea. Read the article, if only for the humor.

Wired News: Cell Phones: Dial 'S' for Shock