Dude (I am now imagining you have a surfer accent), I said a simple search. That doesn't imply I think I saw every car picture. Just like when you throw a net you don't expect to catch every single fish. :P
What it shows is that yes people are submitting them. But probably not in a huge degree, as they usually mention car in the title or the posting somewhere.
Here is the thing. You were caught, and you feel victimized. Think of car posting as speeding tickets. Lots of people speed, but has everyone had a ticket? No. You drew the attention somehow and got smacked down. And they will enforce it, otherwise all of it is pointless.