Taking or spending someone else's bitcoin isn't the right one no matter what network features allow you to do.
Bitcoin give full control, you can have full control with extra protection. If someone wants to generate a paper wallet, he can encrypt it with BIP38 passphrase and have more than one backup separately, also separate backup for both private key and passphrase. That is what full control is, comes with sole protection. In case of one lost backup, the others can be used for recovery. I know you know this.
We can all come out good in the public, but no one can know the realities within individuals, implying that having possession of a misplaced paper wallet is not morally right does not mean those that said it is not right can not even steal it (I do not referring to o_e_l_e_o or you, but you understand what I mean). People think differently, as you are implying it is not morally right, some people will call it God's blessing and opportunity, especially if the founder is poor and suffering from poverty.
We all know this too, looking for full control comes with full responsibility.