Just because he hasn't been hit by a car yet, died of heat stroke or hypothermia yet, or been killed by an angry neighbor yet, didn't mean this won't happen in the future.
What do you mean, are you saying since he wants to stay with us, then it's his decision?
Yes, I would treat him as an indoor cat, until he got accustomed to his new home, as well as outside on the screened porch. I would definitely read more articles on how to adjust a cat to a new home.
I thought of trying to buy the cat, but what if they say no? Now they would know who has their...
Oh and despite him being in our house for months, there have been no "missing cat" signs anywhere for this cat. However, there was a sign for a different neighbor's missing cat. So, this cat's owners obviously don't care about him going missing, even though they said they do want him.
This cat runs and the neighborhood killing animals and angering the neighbors by putting dead rabbits under their porch.
I spoke to the neighbor after finding the owner, but they firstly cussed me out and secondly said it's impossible to keep a cat indoors. Nonsense.
It's illegal in our town...