So I ask you guys, is there not a product out there designed and manufactured for this use?
I don't grind stumps, but my Dad does, about once a month, goes and rents a grinder for the stumps he collects during the month previous (He's owns a lawn service in Florida).
One day Dad was grinding a stump in someone's front yard, the wheel of destruction caught a rock and flung it into the client's front door, which was made entirely of glass.
Afer the cleanup of 80,000 pieces of glass (that's how <i>safety glass</i> works) and $550, and the time replacing the door, he was thinking along the lines of some sort of barrier such as that which you guys are describing.
I like the ideas. Keep em coming.
If there's not something commercially available, let's engineer something here on this thread, and <i>create</i> it.