I crack mine all the time it relieves my knuckles. Many people say knuckle cracking can cause arthuritis this however is not true. Cracking your knuckles is cause when pressure is exerted to your knuckle gass bubbles exert into the fluid around your knuckle joints when the bubble pop or get the the surface this is when you hear the popping noise and you feel better because the gas is what tightens your joint and causes stiffness this is when most decide they need to crack their knuckles hope this has helped some. i dont think it is annoying although it could probobly be up there with cracking gum which i absolutly HATE.

I do it evry now and then. I am not annoyed by that, neither do I understand why another will be annoyed by it - unless if I am cracking your knuckles.

i used to do this many many years ago but i don't do it now. it doesn;t bother me when others do it unless it is done over and over or if they are just trying to be tough

This is what I do. Therefore I know I can be irritating. I've been cracking my knuckles long enough so now they really go 'Crack'. A friend told me she hated the sound of it.

. . . guilty as charged. And I crack my back, too. I know, I know, bad habit . . .