Should I report a multi that hasn't played in a while?

I suspect someone of a multi but they haven't played in a while, should I still report them, incase they might come back.
Conquer Club, a free online multiplayer variation of a popular world domination board game.
http://www.tools.conquerclub.com/forum/
http://www.tools.conquerclub.com/forum/viewtopic.php?f=239&t=10502
Jork wrote:Of course report them!
You're not doing this game ANY GOOD by not!!!!