I've had the same thoughts. Part of me thought that we should purge them with fire. But then I started thinking about what things must look like from the perspective of these new users.
They find a new gaming site. It looks like it might be kind of cool. So they start searching for their favorite games. Finally they find a question that they know the answer to. Mustering their courage, they decide to de-lurk, create a login, and actually participate in the site. They answer the question (which happens to have a duplicate, already accepted answer). What happens next?
A) The user gets an upvote. They think "Cool, now I'm earning rep. I want to find more questions that I can answer. This site is great!"
B) The user gets a downvote and a polite comment. They think "Oh, I guess I don't know what I'm doing". They go back into lurker mode, eventually finding the courage to try again, or moving on to some other site.
C) The user's answer gets deleted. Maybe the same result as B. Or maybe they get confused, wondering what they did wrong. Or maybe they get defensive and say "Who needs this site anyway? It's just a bunch of elitist jerks."
Clearly B and C are not the end result we want. So we need to decide whether the duplicate answers really cause problems, or whether it might be an acceptable price to give people a "safe entry" into participating in the community.