Minta maaf, I understand that there is a history between this player and your group. However, as the post did not breach any of the forums' or game's rules, no action has been taken.
I suggest that you thank the player for seeking recruitment but indicate that he/she is not suited. If the post is a troll attempt, try not to rise to the bait. The more polite you can be, the sooner that this player will tire of it.
Sicariu - I would agree it probably isn't necessary to remove that post as its a few pages back, but we'll keep an eye on things in case things heat up there again.