I guess it depends if reasons behind it. if just trying to piss people off or be stupid and disrespectful then put something on your feet but just maybe they like it and feel they play better barefoot. If thats the case it wouldnt bother me at all. Its like bare foot punters in football. To each his own. My dad has some issues and cannot where many shoes. Golfs in sandles and even wares sandles in the winter. Sad actualy but it is what it is.
The reason we did it at the goat ranch golf course is because we start golfing about 6 am, when the sun was just coming up. Around 4 pm, when you've been golfing for about 10 hours and played around 70 holes, your feet tend to get a bit tired, so a break from the golf shoes feels great.
However, that's the's only place and the only reason I've ever done it.