I don't see any reason for excluding people off trucks, based on ages. There are some 16yr olds that are closer to 20, and others that are closer to 12. Its better to have people at incidents, and then pass them off to do traffic control, or other such things. To be an effective member at future RCR's, you do need to be exposed to the trauma of RCR.
Also... HALLIGAN... Not Hooligan, or haulegine or any other name.
Are you cutting glass or breaking glass? For cutting glass, I'd use either a Glass master, Recip Saw, axe or sledge axe before even entertaining the possibility of the Halligan - Would you try to use the Metal Cutting Claw?
If you are breaking glass, I'd try to use, a glass hammer, marlin spike & lump hammer or multigrips before using the Halligan. You *could* use it, but I'd suggest it would be far more messy than any of the above options.