A ceramic glass breaker isn't going to be any better than the metal tools on laminated glass, breaking the glass is only half the battle, you've still got to get through the intact glass pane held in place by the plastic laminate.

>Nothing wrong with keeping a box of spark plugs in your center console though

But then you've got to keep a tool to break the spark plug to give you a sharp ceramic shard to get through the glass.

Exactly. It’s the plastic middle layer that screws you.