jrg once bubbled...
Of course it's unethical. He should have had the owner's permission to do that.
The store owner sounds like a real tight-a not to allow the instructor to have a discount. Too bad the instructor got caught. Did he ever get his stuff or was he caught first?
I believe the instructor does get a discount, just not the full pop. The shop is run in a rather relaxed atmosphere, which makes the shop a great place to hang out...and I guess inadvertently created fertile grounds for some folks to over-step the boundary.
And - he was "caught" first.