Loose talk costs lives [IRA ca. 70s]

“Who shot ya, Johnny Tight-lips?”

“I ain’t sayin’ nothin’”

“Well what do I tell your mother?”

“Who says I have a mother?”

The first rule of sinn fein is :

I remember a slightly less-diplomatic version of this painted on a wall. Something like "touting (informing) is seriously hazardous to your health", meaning you'll be shot if you talk to the security forces.

Great days...