Ah gotta love those glowering Klingons...but would Vulcans glower? Wouldn't that be going against their whole "no emotion" thing they have going on? Glowering implies a negative emotion and those snotty gits see emotions as being illogical...by snotty gits I mean Vulcans and quite possibly university professors.
You obviously don't know many Vulcans...glowering is their default setting. They are very upset at all the emotion going on around them.
Besides, it's a total fallacy that Vulcans lack emotion. If anything, our copper-blooded cousins are fronting because they come from a desert planet and get really wacko when they're horny.
I ought to know, I was raised by them. Odious lot, but those ears are a turn-on. Lots to nibble on.