It's funny, but I remember being offended that the Hot Coffee content was left on the disc without being an element that could be unlocked legitimately from within the scope of the gameplay. It was a half-made feature that they didn't have the intestinal fortitude to either complete or remove and instead resorted to leaking word of it so that people could mod it and give them lots of "free publicity" -- about which I guess I'm feeling a bit of satisfaction that it wasn't that free.
Really, after GTA IV, if they make GTA V, I'll buy it (though, seriously, I want it to take place in Tokyo. Is that too much to ask? Yeah? Okay, you're probably right...). I just don't want to hear about them making adult stuff for a game and then -not- including it.