I could see this as a problem but as a propetuator of realism....this is kick ass!
They won't hurt people any more but they will look more realistic hitting stuff! No more driving around in a jeep like it's a tank when you start to see the window cracking and shattering! Imagine the dramtic effects of having windows shattering and splinters of other things flying all over during a firefight inside. Field owners could find cheap disposable glass and plastic to replace every so often!
Haha, would be sweet....but somehow I doubt people will go for it, here at least.