Here is what dopefish said on steam to someone else telling people they will get banned hehe... And the link, If you read through the whole thread the person he is explaining this to thinks it is cheating so he is just spreading rumors basically... http://forums.steampowered.com/forums/showthread.php?p=18502523
"I am the author of Widescreen Fixer.
I would like to know where you are getting this information and why you have so much hostility towards the application.
Myself and many, many others have all logged countless hours of playing CoD4, CoD:WaW, CoD:MW2, and soon CoD:BO and have yet to receive any kick or ban. I have hundreds of emails of people telling me it works great and not one email of someone saying they were banned because of it.
You said it directly writes to the .exe file. This is not true. It overwrites several offsets in memory. The offsets it edits are offsets that naturally get modified by the game itself based on your settings.
To top this off, you have no first-hand experience using this application. You "claim" that you have friends banned because of it. You have no actual proof of it triggering a VAC ban. It sounds more like you have some vendetta against the application than any valid reason.
While I will not guarantee anyone risk-free usage of Widescreen Fixer, myself and countless others have been using it for quite a long time and have yet to receive any ban.
I am interested in knowing why you feel the way you do about the application and, if you happen to have a NVIDIA Surround/AMD Eyefinity setup, that you at least check it out yourself. It really provides a whole new, enjoyable experience."