You must be seriously misinformed, and never heard of the word microbrew. Basically most beers associated with InBev are mass produced and not of good quality, and those happen to be from all over the world and not just the United States.

It has nothing to do with regulations, its all about profit and not every brewery is working that way. Here is a list of American beers to try and enlighten you;

Dogfish Head 90 Minute Ale (120 Minute Ale)
Brooklyn Black Ops
Ommengang (makes a nice Belgian-American hybrid)
Goose Island Ale
Sam Adams Alpine Spring
Sam Adams Cold Snap
UFO White
Stone IPA
Backlash Death
Sierra Nevada
and the list goes on.

The mass produced market of cheap beer is everywhere, not just the United States...do a search on InBev and get a list of all the nasty beers you ever had, its run by them, not microbrews.