given compliance with your 'ground' rules, it's a sorta free country, so go for it. it comes down to your judgement - off topic or not. but, as you recognize, your judgement is a sliding scale which in large part comes down to your lawnmower beer.
most people describe lawnmower beer using terms like light, easy drinking, refreshing, low-alcohol, etc. on the other hand, my lawnmower beer is called Brush-hog Stout, a bruiser of an RIS and anything but light or low-alcohol (though I think it's easy drinking). so I say go for it, but use your judgement. and no matter what maxieboy says, don't give the ossifers an easy bust by going no-pants. I think even Weaze would give you a nod for wearing a kilt in this situation.