I think that it's easy for these things to get out of hand. Everyone wants to share their opinion and it all comes across way more antagonistic than most people intend. Things get taken in a different spirit than they were meant, people take things personally, etc.
The general point is everyone wants the fever zone to be big, fun, and providing great support for the team. Disagreements happen but ultimately we are all on the same side.
Surely we don't want every piece of railing/fence around the aisles in FZ covered in non-Phoenix banners/flags
If flags of other clubs want to be displayed, lets allocate an empty aisle where people can put their banners/flags
Note: A-League policy needs to be accommodated
Note for trolls: that was not my motivation to object to the display of a non-Phoenix banner in the YF Zone :-)