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.” ...

I am a retired NYPD officer, and the blue stripe represents the officers who lost their lives in the line of duty. I have been flying that flag for about 10 years and have never been told that it ...