Not sure if this was posted before, but to get rid of people bumping their own post when no one else responds to it, just take off the reply button for a person's own post, and that way, they can't reply but they can still edit.
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Yea I agree with poocho. I've locked maybe 5 topics because of bumping...It's not a big problem, but it's cool that you guys are thinking of solution nonetheless. Keep up the good suggestions.