If you are in the country (rural), where people nearby are not at risk, I do not see any problem with guarding your flock. Had 2 loose large dogs wipe out my flock of around 20 young birds several years back. Asked a law enforcement officer at the time what I could do about something like that...
Today is my 1 week anniversary as a member of BackYard Chickens.com! When I saw this recognition posted on the website, the first thing I thought of was the Dad on the "Christmas Story" movie that is played repeatedly at Christmas time. Remember? He receives the special award that turns out...