Filed? What’s that? 
Mine have a tendency to tear if they get too long. Plus injure people.
But I don’t bite them off to the quick, like some guys. Trim short with a clipper, or if I’m desperate and can’t find clippers, I’ll file. I suppose hitting the edge with a file once in a while would help with the catching on corners and breaking them off, but what guy wants to do that?
I grow all of my nails long. Sometimes, all but one will break in rapid succession, as was the case very recently. All of my nails are currently very short (for me), except my left ringfingernail, which is almost half an inch long. I have to endure countless “coke pinkie” jokes from people who believe that they’re the first to point it out. Fortunately, I still can claw their eyes out…
An infinite number of rednecks in an infinite number of pickup trucks shooting an infinite number of shotguns at an infinite number of road signs will eventually produce all the world’s great works of literature in Braille.