Forum:Plagarism on other wikis

So recently, I decided to expand my fan-fiction, and to become an editor on the Dead Space Fanon Wiki. I became one of the few regular editors and everything was cool. Then I discovered that Nonosoldier had also maintained a presence on that wiki. What I wasn't expecting to see was his Dead Space: Reintegration RP. It soon became clear to me that he was copying the format that I used on Gaining Faith. What I wasn't expecting from such an esteemed editor, however, was the manner in which he copied and pasted the entire page, including my paragraphs exactly. Everything is worded the same, and he didn't even bother to cover it up!

What should I do. It's fairly old and abandoned, so I am considering taking the liberty of deleting it myself. I wouldn't consider doing so, however, without brining his scam to light here, first. Write what you will, below. Can any of the more experienced editors here give me advice on how to handle this?