Can you block the link's domain for everybody?
From experience I can say that it's much simpler than telling people not to click on stuff. Because if you tell them to not click on something, they WILL try and click on it .Usually guys thinking that maybe there might be porn or warez of their interest on said links, even if you personally tell them it's just some sort of scam.
That may sound a little dictatorial, but remember, the morons are still free to screw their systems over at home or somewhere else.