Interesting thought- 'til now, it hadn't really occurred to me that you don't really see bike commercials.

Advertising during events, though, is like preaching to the choir. Everyone who's there already has SOME kind of bike, and no amt. of advertising is going to sway those with a definite brand loyalty.

I think the general American consensus is that it's an accepted lifestyle; everyone knows we exist, and it makes them look friendlier to 'accept' us or feature us in their ads, but God forbid they have to respect our rights.
Put that way, it sounds like the general consensus on a lot of things.