Glad to hear you dont kill em either. They are a vital part of the wildlife. There's no reason to kill them unless they are a nuisance and there is no other way.
Changing direction, knowing when and where they most frequent and at what times they like and moving them can all be used prior to killing them.
Cottonmouths and Copperheads excluded, copperheards have a nasty temper and so do cottonmouths. They inject loads more venom than their cousins the rattlers and do so out of anger as well as fear.
Rattlers differ in this as they normally bite but don't inject venom. Of all the bites by rattlers a good portion of them dont inject and have "dry bites" while cottonmouths and copperheads 99% of the time bite with venom.
The cottonmouth and copperhead are territorial and therefore use venom to defend territory.
Rattlers for the most part will flee before fighting and this has been true for the two I have moved they wanted to get to the woods fast once discovered.
Neither one of them coiled up for striking purpose or rattled much this shouldn't be confused for tameness though