Question: Was anyone allowed to call Mr Rogers "Fred"? 

Answer: Not on the show.  It went along with the formal clothes and proper language he used - he was supposed to be somewhat of an authority figure to kids, not on their level (although he wasn't talking down to them, either).  Off the show, though, I'm sure people referred to him by his given name.\n\n(I loved that show!  Rest in peace, Mr. Rogers.)
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