I won't judge someone for keeping a wild caught snake that is very plentiful in the wild. If you think about it corns and balls have some of the largest number of morphs in the hobby. Typically new genes come from wild caught animals that have been bred. It's also where you get locality based appearances.
I'm into corns and would like to someday obtain a wild caught corn from the region I live in.
I had a similar situation a while back. I found a baby black rat in my house trying to break into my rodent tanks. I had thought about just keeping him but in the end I decided he would be best in the wild and controlling the local rat population. I kept him in quarantine for a week and gave him a few meals, water and a safe place to sleep it off before putting him back outside.