How many fuel filters is too many fuel filters?

If a crash is violent enough to move enough metal in the engine compartment to crush the plastic filter it will crush the metal filter too, which will still rupture and leak. And in either case if there's that much moving around the rubber and hard lines usually get separated anyway. The hard lines get damaged more than anything, they get pinched off, kinked so the leak and torn open pretty frequently because they don't deal with the frame, engine and body moving around independently of each other.

Aftermarket, owner added electric fuel pumps are way scarier in a crash. They get installed without rollover switches, power pulled so they keep running after an accident even if the engine stalls, etc. That's far worse than a plastic fuel filter connected between a couple sections of rubber fuel line. And the VAST majority of accidents don't result in fire, even though fuel gets spilled/leaked pretty frequently. You guys are watching too many movies.