One man's Garden Gnome is another man's pile of dog poop.
Just follow the restrictions in the area where you live and Code Compliance won't bother you.
I would like to put a 43' aluminum mast (not a flag pole) in my yard, but it is prohibited. Maybe I could start with a 6' mast and have it grow over time. If you don't nip it in the bud and you give me an inch, I might take a mile later.