One of the companies that the entertainment industry hires to send out nastygrams to people it believes are file sharing illegally is BayTSP. The company tries to hunt down IP addresses and then try to notify the user. Apparently, a part of this process is also to include a link to a web form where the user can respond to the notice and tell BayTSP if you will comply with their infringement notice and remove the offending files from your computer. Except, some are noticing, that BayTSP's method of doing this isn't even remotely secure
, so the response forms are available for anyone to see -- and to respond to. You can find your own with a little help from Google
Even worse, you could send your own notices, pretending to be BayTSP, and get people to fill out the forms instead. And, on top of that, some have discovered that BayTSP's site has some scripting vulnerabilities such that you could create a fake complaint and get people to, say, download malware or enter credit card data. Once again demonstrating the high level of technical incompetence from the folks the RIAA and MPAA hire to piss off fans worldwide.