Well livng in London i dont really get the weather that the majority get out in the US so i have to say i dont wear shorts when playing golf. I would have to agree that shirt untucked is not a good look for the golf course. If the weather does get a hot (which is very rare in the UK) then i have some light weight trousers i like to wear, but again my shirt is always tucked in.
This could open up a slightly different topic. I tend to wear bright colours on the course, i have a pair of pink, green, Red and Blue trousers which I like to wear regularly.
Do people get annoyed with bright colours the same way they do with shirts untucked and cargo shorts?