I experienced it for the first time in Arathi Basin last week. The first thing I noticed was a group of mounted players doing laps around the battleground, but offering no resistance. Someone called out "inc farm," but they rode right by. The procession popped through the lumber mill, but kept going. Once I knew LM was secure I headed to the stables, where I saw a number of players with no gear either making nominal dashes toward the stables flag or dancing in their start zone.
Even as the 'benefactor" of three easy marks, it ruffled my feathers some. I agree with Samis of Windrunner, I just don't see the point of working for PvP gear if you don't actually enjoy the PvP.
I've never heard of Blizzard taking action against losing premades. Some of the posters have said that it's happened. We talked about this a bit on the WoW Insider show. It doesn't seem all that different from honor farming afk, which Blizzard has attempted to stop.
Should Blizzard do something about intentional losses?