I'm unaware of any LAW or AGENCY POLICY that would PROHIBIT me from asking for help or accepting offers for help... even from ARMED CITIZENS. In fact, by statutory law, refusing a LAWFUL request for help is a violation of FSS 843.06.
I'm sure we will need an entirely new thread to debate the merits of such a topic...
If, UNDER THE RIGHT SET OF CIRCUMSTANCES, I encountered an armed citizen who appeared to be capable of helping until more "OFFICIAL" help arrived, I don't think I'd turn the help down. On the other hand, if an elderly citizen who was shaking uncontrollably offered help, I think I'd help them just go to safety.
Now... this thread ought to get really interesting...