Full disclosure - I was the person who sent Will the link where I noted that he was my nemesis. So Will's post isn't so much a comeback, but merely repeating to me something I'd already noted.
Will Enger: I already was the nemesis
Ian Smith: I guess I made it official. Prepare to get rekt.
Will Enger: You have referred to me as your nemesis previously.
Ian Smith: wat
It seems you are correct:
Will Enger: Indeed