Balkers who obstruct others during balking should die!

I hate balkers who obstruct others during their balking process. In case you didn't know, balking means switching to another queue from the original queue. An example would be when someone queueing to get out of an MRT station switches to exit from another gate, and balk in the process.

These people need more queue discipline. I'm not against balking, just that people should balk without obstructing other people. I hate it when I have to slow down or stop when someone from the next queue suddenly go in front of me. Shouldn't they at least look behind to see if there's any 'oncoming traffic' before balking? Bloody numbskulls!