Didn't read the thread, just the title.
Event Team Members are pretty free to create their own rule-sets for certain events such as TTS, I believe it adds a bit of uniqueness to each Event Team Member and their individual events, if you do not wish to participate using these select rules, please opt out of such events and wait for another events team member to host.
As a prime example, I make my own rules in regards to explosive chance, I add a unique spin on top of the regular gameplay, John is merely doing this exact same thing by adding a little extra competition into tag tag team rather than PBP Shotgun being sprayed in such a small area.
I may even have a command made to disable the PBP Shotgun as a special "Rule set" so it is easier to police.