Danger Danger, somebody please think of the children!
Why the hell would anyone be worried about these, they are not going to shatter. In fact they would stay intact where others would break.
If everyone uses the same protection they have always been using, rated glasses, goggles, mouth guards or full face masks you will not have an issue. Teeth will chip and bleeders will happen no matter what BB you use especially with a heavier weight.
If you choose not to use any protective gear for those areas, that is up to the individual and a recognized risk in this sport.
When they start coming out with eye protection made from windshield glass, then I will become concerned.