So, I reload back before getting to diamond city, talk to Piper and the Mayor and get to my theft. This time I make sure to never steal anything with an NPC in the same room or having line of sight. Same result, radioactive buddy comes to get me.
So I reload AGAIN, this time using the console to toggle off AI detection entirely. I go and do my stealing, never while in the same room or having LoS with an NPC, and yet again the protectron shows up.
I assume the protectron isn't hostile because I haven't been "detected" stealing, but comes to get me because I stole and some game mechanic triggered to send him after me. Has anyone else had issues like this while stealing? Is there a work-around to steal without making radioactive friends? Or do I have to dispose of the protectron and/or jump forward in time? I'm looking for a way to stop this issue before it starts.