I Am Not A Hedgehog! Dr. Hedgeh Is Not Happy People Keep Messing With His Door Sign (Photo)
This is just my opinion, but if you are born with the last name "Hedgeh" you are entering into a social contract in which you agree to allow people to add "og" to the end of it for as long as you are alive.
I'd hope that someone smart enough to get a doctorate in anything would realize that this is human nature. If you don't like it, it's on you to change your name, not on other people to restrain themselves from defacing the sign on your door.
For a similar instance of signs taking abuse, check out how mad some guy named Vince is about people putting loaves of bread in his toilet.