GPL and DMCA (Score 1)

Let's say (for the sake of argument) that I am an asshole. I make a project in which I (I here means a company rich enough to do court battles) 'borrow' 80% of the source from GPL'ed sources, and add 20% home-grown proprietary code. Now, to use this code I have made my own editor which has an obfuscate module you have to log into to use. When I release the obfuscated code (in accordance with the GPL) could I then use the DMCA to sue anyone who tried to clean it up? After all my 'protection scheme' would be broken, and the obfuscated code would be the preferred one to edit as the proprietary editor would translate the obfuscated code into normal source.