I have decided that I will from this day forth consider "Adam Harstad" to be a racial slur. It's offensive to me and has no place in a civilized society.
Please change your tag or I will be forced to seek legal action.
What? You don't agree that "Adam Harstad" is a racial slur?!?!?
How dare you tell me what is and is not offensive to me?!?!
You will be hearing from my attorney very soon.
Well, for starters, my name isn't trademarked. You are free to sell t-shirts prominently branded with "Adam Harstad". If I wanted to get you to stop, I'd probably have to resort to slander and libel arguments rather than trademark arguments.
But let's pretend for a moment that I actually had trademarked that name, and you wanted to get it deregistered as a trademark on the grounds that it is a racial slur. You'd first have to prove standing- that you are the race thus being slurred, that damages have occurred, and that the statute of limitations has not expired on your claim. After that, you'd have to prove that it was actually a racist slur, and your personal feelings will be inadmissible as evidence.
But let's pretend for a moment that you manage to prove standing and provide evidence that my name really is a slur. Great, any trademark I held on it would therefore be canceled. I still wouldn't have to "change my tag", as you demand. I'd still be free to call myself Adam Harstad with impunity, and nobody could stop me. All that changes is that I no longer had the legal grounds to stop others from using my name for whatever they want, too. In other words, I can continue registering as "Adam Harstad", but you'd be just as free to register as "Adam Harstad", if you wanted (although, again, libel and slander laws would still apply).