I know a lot of you are familiar with Bruce Schneier. For those of you who haven't seen his annual Movie-Plot Threat Contest, they're great fun! This year he's doing fake ads - invent something for people to be afraid of, then write an ad (no more than 150 words!) telling what they should be afraid of, and why they should buy your (fictional) product to alleviate the fear. There are a lot of neat products this year.
Go look!