On.
I'm blind as hell without my glasses and I never remember to bring my extra pair so if I'm wearing my sunglasses they stay on no matter what. If it was only going to be a few minutes I wouldn't swap even if I had my normal pair.
I never understood the "sunglasses indoors in douchey" thing anyway.
Um actually is a "less deadly" weapon so it's perfectly fine to shoot at whoever you feel like!