One thing I have is "rules for when I'm breaking rules".. Yup, guilty as charged, I run the top handle with one hand. But.. as I said, I've got rules for doing that.
1) Yup.. I'll trim a tree I've felled with the top handle. But, only if I'm on the other side of the trunk. Kick back would miss me, Trunk protects me from my stupidity in case I miss seeing something that is dangerous..
2) Always a straight arm, no bends at the elbow. Ever. Stops ( to a point) , of kickback. I also run a low kickback chain.. doesn't cut as fast as the saw is capable of, but is safer to operate.
3) Gear.. chaps, gloves, ear protection, eye protection. foot protection. I don't care if it's hot, and I'm sweating like a pig.. **** ain't meant to be comfortable, it's meant to protect me from myself.
4) When I run a job with a crew, no one gets to use any saw one handed. I only do that when I'm doing something small by myself. I won't be a bad example. The only exception is if I've hired a climbing Arborist. Up in the tree, it's his call. I might not say anything, but then again, I might not have him as the first on to call for.
5) No drop starting the saw with anyone around. I don't want to encourage anyone to think that if I did it, it must be O.K. for them to do too.