Tablesaw & bandsaw – never get complacent. I always count my fingers (out loud) before operating them. This is to reinforce in my mind that I want the count to be the same after I’ve used them. When ever I feel inclined to reach in with a bare finger and do something stupid, I mumble “Don’t do it, Stumpy!” Because you know your friends will give you a new nickname, right?
Unfortunately, even real pros will screw up. (Jimmy Diresta!) So it’s a pity that the SawStop guy didn’t adopt a more socially responsible approach to the technology!
ETA: Or that the patent office isn’t able to make decisions on the basis of the public good.