Not an original orange DK button, and those guys are brittle. I have had to reprimand people for smacking it like a whack-a-mole. I guess they think if they hit it harder, they will jump higher.
Is it even possible to break or otherwise damage the jump button on a Donkey Kong by hitting it with your hand? I mean, really. Think about it. It's a piece of plastic, designed with the express purpose of being pressed. The only way I could envision anyone damaging one is by melting it with a cigarette (which is why the start buttons on DK's are always trashed), or smashing it with a hammer.
On a standard arcade machine, with normal buttons (leaf/microswitch/etc), you aren't going to damage them with your hands alone. Same with pinball flipper buttons. People like to hit them harder, as if that somehow hits the ball harder. But no matter how hard someone smacks the button with their fingers, they're not going to break it. Remember, this is commercial equipment designed for this exact purpose.
Some of the special controls, yeah, you might be able to break them by being rough. Guns from gun games, definitely. Slam them into the floor a few times, you'll break them. That's why many games had chains preventing the guns from hitting the floor. But even on Tron or GORF, the controllers are incredibly durable - and it's easy to sling them pretty hard when avoiding stuff in the game, they're not as stiff as normal sticks. I frequently find myself making a lot of noise playing GORF. But it's not as if I'm slamming it with tons of force - it just happens. And it's not going to hurt it.
Sometimes I see people really slamming the stick around on Ms. Pac-Man, as if pushing it harder is going to outrun ghosts better. It won't. But you're also not going to hurt the stick.
I frequently see kids banging on games on location - they bang on the buttons and rattle the joystick around - but that's not going to hurt them. It's when kids *hang* on the sticks, that's going to definitely damage them. I had to replace the sticks (standard Happ microswitch sticks) on one game I bought because they were bent pretty badly. Now I know how that happens.
There are *definitely* ways to damage games. But hitting the buttons hard isn't one of them...
-Ian