Best punishment would have been to suspend a week's pay just to let him and all other campaign members what the consequences are for this..and probably some comments on the spreadsheet to alert everyone you have an eagles eye on them.
Secondly, it would be interesting to see the pattern of the quota's... If it's always say 30 posts as required by dig, doesn't show natural contribution towards the forum as I know some managers don't like members that hover just around the maximum allowed post numbers.
Now with this, hope his not tainted for this.