The reason glass bottles are prohibited at some workplaces are mostly because of situations in factories(or similar) where you let your bottle fall to the ground and the glass can hurt others unintentionally, disrupting the work, (maybe also insurance, I don't know), etc. It's just to prevent workplace injuries.

I could have made that clearer in my sentence, sorry.

Um, right, which place would that be that you control the actions of others? I've seen two programmers get in a fight before, in a place I would consider rather safe and non violent.