There are no good answers to this.
Agreed.
The association has a right to tell you to have little or no alternative fuel sources. These fuels are potentially dangerous and could do a lot of damage or kill people if it got out of hand.
No disagreement here but I'll bet the person with the questionable/forbidden fuel would be very popular during an event where heat was needed, to the point that unwelcome guests would likely need to be turned away.
Face it, in the eyes of the unprepared, we're all dangerous nut cases until something bad happens, like the guy played by Michael Gross in Tremors.