Ok, so here's the deal. I was in a war the other day. At first, it was as fair as I could hope for. Then , something went really wrong. Whenever we wanted to attack somebody, a bubble popped up that said "defender too weak" . I scouted and looked at the stats. They were super good. However, it was too late when we found out what happened: the players on the other side were getting rid of their troops so we couldn't attack them. We found out their strategy , but still lost. KaW staff, please fix this scenario in the next KaW update. It gives clans no hope at winning.
Self pinning is a legitimate war strategy. It's been used ever since the clan war system came out. You can fight it by self pinning and hoping it throws them off there game. Then you can catch them as they start coming out of pin.