Some things that grate with me - men in brogues not wearing socks (why not wear deck shoes and why make your best shoes all smelly and sweaty?), wearing a shirt and tie but with tie undone (why bother with the tie?), hats pushed too far back (wide boy), white socks with anything other than sports clothes (yuck) and finally wearing sunglasses indoors or at night (why?).
I recognise that these things sometimes result from error or forgetfulness - and that's often forgiveable. What is unacceptable, though, is doing these things and thinking it's cool (although I'm now going to admit that I have a sneaking admiration for the wearer of the odd brogues worn above with no socks).
Please take all this with a pinch of salt; but have a look at the photos and you'll see that I'm right -