Originally Posted by moogy
The idea of getting hit at 450 fps is not a problem for me.
The situation is what can be the result in been hit. Some guys have mesh goggles an if they are unlucky enough to be shot in the mesh at less then 20 feet with a bio bb that will explode on contact... well just say I wouldn't want to be that guy.
It's about minimising stupid accidents. Getting clipped in the ass is a matter of pride not pain. I don't think anyone would like to get one in the ear or the mouth, even the nose not mentioning the eyes. It's not about pain... but long term damage that can't be fixed with a couple of days to shake it off.
That's one of the reasons that mesh goggles aren't allowed on all fields (paintball fields, for example) and generally discouraged: they're a "wear at your own risk" item, similar to ballistic glasses (i.e., non sealing). They're fine 99.9% of the time, but you do open yourself up to an extra amount of risk.
For similar reasons, some brands of bio BBs are discouraged. Even with full season tactical or paintball goggles, fragments can still enter through small ventilation holes.