I am a symbol of authority, righteousness and order but add one letter and I become a dangerous lawless and chaotic omnivore.

If I'm black, Best for you not to attack, Else I'll whack Your nut sack

Made to keep sun out of ones eyes, worn backwards to keep your inner bad boy alive. I can alter your appearance to some degree, but I'll mess your hair up most definitely!

I may charm you with my beauty, then chase you for admiring it.

Are you sure? the architect asked, This is a weird task. I'm sure, the witch said, This will give me food when times are bad. My house is gonna be made of...