Lot of emotional responses here. With regards to protecting my chickens - I tend to think about what will work in the longer term. If I shoot a hawk today, and another one comes along tomorrow (which is going to happen, as migration season goes into full swing) - what have I accomplished for my chickens? Not much. They aren't any safer than before I shot the hawk, so the effort was wasted. Better to invest my time into PROTECTION - puting up defences to keep the raptors away from the flock. Might not work 100%, but nothing does, including SSS.
Sometimes it's the other way around. I get a problem skunk once in a while, finds a place where I can't get the electric wire close enough to the ground (we have really small skunks), and I have to trap it. (The rest of them are welcome to come eat the snails, slugs, and yellowjackets.) In other situations people have the same situation with a raccoon - you get one that just figures you out, and the only thing you can do is eliminate the individual. Bears and mountain lions have large territories, so if you take one out you buy quite a bit of time before another will move in.
But in general, eliminating individual predators doesn't make sense for me, because there is a practically endless supply of them; if that was my primary strategy I'd be shooting and shoveling all the time, and losing chickens just as fast. I invest most of my effort into deterrence, which in the long run takes less effort and is much more effective.
Defending home and family against human intruders is another matter entirely - in that case the problem is definitely with the individual, and so the solution lies there as well. SSS is a high-risk strategy though!