No, not in real life (I hope), but the second you enter it you get a disease that kills you even before you can cleanse it. I died on one toon to it and decided "I must taste the forbidden fruit of Blackrock Howling Fjord!" so made a pally with cleanse on my mouse wheel. But I didn't even live long enough to cleanse it.
I assume this is a bug, but if I unknowingly entered some gladiator's playground inaccessible to mere mortals, please don't ban Warmane- was just riding around.
https://youtu.be/9n5vXEx2D0Q