A reader is irate over advice that homeowner associations must let residents fly 'thin blue line' flag due to legal protections. Our legal expert responds.

The ‘blue line’ flag was designed for police officers and it goes back over 100 years, but now it has been used by white supremacists and many police groups have disavowed that flag.” ...

The thin blue line flag is a black and white American flag with a blue horizontal ... Steven DiSario, 36, was working with the Kirkersville Police Department when he was killed in 2017.