If the issue is with the bands taping policy of No Boards I understand what you are saying but know that many matrix recordings have been and are still being done. I guess if they are using it to set the typical AUD apart from the disclogic stuff it makes sense it just means a longer wait and a few bucks.
Dobz and the band are very accomodating when they can be. If you were there early and wanted to run a matrix I dont see it as being an issue they will just ask that the show doesn\'t get bit torrented etc. they might even use it for their stuff and give you a nod.
The policy is pretty standard in taping circles. It is usually so the soundman isn\'t getting bothered by folks wanting to plug in and having top worry about some
**** turning on phantom power and frying the soundboard (which has happen to some very big acts)
Bands like the radiators always have a patchbay at shows so you can come up and plug in but that is very very very rare in general and nowadays almost unheard of.