I have a few lids (I tend to double up on some kit as I buy for my son as well), but only use the lids when playing urban type sites, the risk from low pipes at the mall or numerous shiz at the ucap tunnels etc etc means sweating up is preferable to stitches & concussion.
Dont worry about being shot in the nut, as far as I'm concerned that's all part of the game.
I do reccomend the dial type adjusters in lids, even bought a new cradle for my old 2001 that didn't have a dial, way more comfortable than the old chinstraps etc.