I dunno. Accidentally discovering a way to, say, shove dark matter around with microwaves and do useful work with it would not necessarily violate momentum cons

I dunno. Accidentally discovering a way to, say, shove dark matter around with microwaves and do useful work with it would not necessarily violate momentum conservation, and wouldn't really be that boring. (Not that I think this is what the EM drive is doing, or that I'd bet on it with anything other than very long odds, but I'm glad someone is looking into it).