I hope this is in the right place but something I've noticed.

When ppl wear caps on TV, they are usually just BLANK caps with nothing on them, in real life you hardly ever just see a plain cap with no logo or writting or SOMETHING on it. I have a few plain caps but they are very rare.

I guess it has something to do with copy rights but just something I noticed.

Probably because any logo seen on the cap would be considered free advertising if the company wasn't already a sponsor.