:So, for right now, I would suggest disengaging.  Yes, you were obviously "there first" and have made substantial edits to every article you've listed, and he's a recent newcomer.  However, you don't WP:OWN the articles, and the fact that they form a pretty narrow topic is a reasonable defense against wikihounding accusationshe can simply say "What? I was just editing a bunch of RC articles, how was I to know this guy was already editing all of them?" and have some plausible deniability.  So disengage, don't escalate, and use the dispute resolution process (WP:3O is a good start between two editors) to demonstrate your good faith interest in the articles. Oh, and ask for more help if anything else starts going sideways.  Cheers,