At first glance reason is obvious - people who try to play this game do not know main principals of Constructive Confrontation communication style (inspired by Andrew Grove). These could be shortly summarized as:
- Timeliness - there is no reason to confront about the problem that was already resolved and forgotten or there are other much more important problems at the same time
 - Targeting - there is no reason to confront with people which can't resolve the problem
 - Facts and data - do not start confrontation if you have no facts/data that confirm existence of the problem and its importance
 - Resolve problem but not person - try to get solution of the problem but not blame people because otherwise people will defend themselves instead of resolving the problem
 
...and just one addition from my side - all this should have a goal. In many cases this is just resolving of the problem. But sometimes goal could be more complicated and multi-directional.