Lock snapping is a procedure that enables unwanted visitors to gain access to your home very quickly with minimal noise. If you were in you living room it is unlikely you would hear someone gaining access this way.
If you find the locks internally are like this but the outside is flush against the handles then there is no need to worry. but at some stage you should think about flush fitting locks both sides.
http://www.youtube.com/watch?v=2A2Vuxuf0zI in this link you can see a You Tube Video regarding Lock Snapping if you are concerned Ring me on 0333 700 2 247 and i will come round and in stall a new correctly fitted or anti snap cylinder for you.