So I guess to be more safe you would need some sort of strap that would catch the valve if it were to ever go for a ride.

In climbing we have zipper slings were the sewing in meant to rip to reduce the force on a risky peice of protection.

Not sure what you would need if the thing went thru a wall (yikes). Still something to consider. I would have thought that if it was a big issuse that they would have a safe setup by now.
_________________________
rhombus -- SOXC Member
www.soxc.org