All it takes is one argument to stick. I've been there, throwing stuff up there, all crap, but suddenly, out of nowhere, something catches the judge's eye, and an articulatable theory is presented that becomes a dispositive element, from out of nowhere. So yes, it is a well used tactic.
This said, MNTA has to show likely to prevail. Throwing stuff on the wall, unless one piece really sticks, is not a great strategy for the other side to show that MNTA is not likely to prevail, but rather seems to demonstrate that MNTA "may" fail, but that is known already.
So this sort of behavior is out of weakness...doesn't mean something effective might not flow from it, as it sometimes does.
Tinker
