dytis-sm
Contributor
I think as in any other social situation when something bothers you, just politely let whoever bothers you know. I think that checking ones BC is "supervisory" in nature (seems like every time I dive with a DM they do that) and may appear as a "helpful gesture" but I think it is totally rude touching someones gear without asking or discussing it ahead. Particularly since our equipment are life support instruments. The whole issue is about manners in general which are less taught nowadays!