DEAR MISS MANNERS: I would like to point out something that happens quite frequently to me, and to other people I have seen, with hurtful results. I was often told by family members and acquaintances that I bore a striking resemblance to a famous actor. Unfortunately, this is an actor who is not known for being handsome, but rather odd-looking and decidedly unattractive. No one ever stopped to think that this was boorish and thoughtless. Eventually, I drastically changed my hairstyle and grew facial hair in an attempt to change my appearance. Now, the remarks I get from total strangers — most…