I agree about getting rid of one that attacks children. That's just a little too much for me. If any of ours ever attacks my daughter or even tries, it's going to find a new home.
You guys will probably laugh, but I actually had to knock a mean cat in the head with a stick one time. I was walking my dog and this cat just ran up out of nowhere and jumped on him. I always walk with a stick since a neighbor's dog tried to attack us, so I hit the cat with it. I didn't totally knock it out, but I knocked it backwards and it was dazed a bit. It tried creeping back up behind us soon after and all I had to do was turn around and hold the stick up. It ran the other way as fast as it could go!
Edited to add: I saw that cat in the road about a week later where it had been killed by a car. I was glad to see it gone, but I promise I wasn't the one who ran over it.