Accepted.
User will be spoken to regarding this actions, via a PM.
It seems like a common case of grow up really, you both need to understand that you need to be respectful to each other regardless of how you feel about each other. This is a gaming community, we're all a little bit thick-skinned because of that, but consistently being disrespectful will not be tolerated. Please avoid each other entirely, and don't rise to each others comments, you're not children.