Blah, blah, blah. Too many stupid rules. Of course, someone will say that a person could put up an obscene (by most standards) mural, if there are no rules. But at some point this just gets ridiculous.
Here are a couple examples from Eugene. There used to be a Veterans’ Day parade in Eugene, but the city bureaucracies combined efforts to eventually drive it away. Luckily Springfield is just across the I-5 freeway and welcomed it. When the US went into Kuwait in 1991, a motel put out flags as it did for holidays on the parking strip, but it had to remove them because it was “an illegal display of the American flag”.