Scott Pakin's Automatic Complaint-letter Generator has been around for a very long time. It can create up to three paragraphs of complaints. The letter is assembled randomly, so you are assured of original insults each time. It's possible to complain about a person or about a company or organization.
Someone already complained about The Generator:
My complaint about The Generator.
Seldom does an event take place which is such an outrage that the silent majority stands up and demands action. But the silent majority is currently demanding that something be done about The Generator.
To begin with, Generator's latest manifesto, like all the ones that preceded it, is a consummate anthology of disastrously bad writing teeming with misquotations and inaccuracies, an odyssey of anecdotes that are occasionally entertaining.
[ Complaint Letter Generator ]
(via Joel)