LOLalert. People wear caps for different reasons (eg messy hair but lazy to have it made) and if you think people should only wear caps for protection from the sun you seriously have some problems man.

That aside, I think it all depends on the overall style whether you wear the polo popped or not. For me, I have a few polo shirts but a few of them have short and hard collars meant to be popped (eg Zara's basic polo). If it looks nice on my clothing at the time maybe with shorts and loafers, I'll just leave it popped.

Most of the time I have them down though.