How do you feel when you see the Flag not being flown properly? and How do you respond?

On Patriots Day, 9/11, I noticed several businesses fly the U.S. Flag at full mass. Personnally any time I notice a business not flying the flag properly, it really gets to me. I had time to spare in between appointments so when I finally got off the freeway and stopped, I looked up the phone numbers to the companies and told them that they needed to be flying the Flag at half-mass. I also stopped at several business and went inside to tell them as well. I make it a point to notify any business that is not flying the Flag properly. I was just wondering how everyone else feels about this, and if any of you do anything similar.