Motorola RAZR V3m External Glass

This may sound like a really dumb question, but please just keep with me here... lol:

I cracked the external glass on my RAZR-V3m... the lcd screen itself still works just fine.

What would happen if say the external glass completely came off? Would the screen still work, or should I really worry about protecting this already cracked screen?

Thanks!

I have the same problem, my V3 still working since five month ago