You know it's spam. We all know it's spam. Why give it legitimacy by replying? Just report it (you all know how), and move on.
You know he's a troll. We all know he's a troll. Don't tell him he's a troll. That will just piss him off. Ignore him and he'll go away. Do not feed the trolls!
You know he's a troll. We all know he's a troll. Don't tell him he's a troll. That will just piss him off. Ignore him and he'll go away. Do not feed the trolls!