If the delivery is in-person you don't need escrow.
Unless if you are afraid of might you going to meet/ see in your meeting point.
You mean like getting robbed? Online escrow won't help with that.
Yes. Probably won't help but it depends on how anyone thinks of it. For some, it might sound like a safety measure while for others a useless action.
The thing is that here the scammer has the mine trap setup and ready to blow. I doubt that there is anyone who would be able to notice it or think that the account was compromised and freeze the deal. Unfortunately, it might happen to anybody.