Getting a thread of users who write just to meet the quota of the signature they are enrolled in might be a very difficult job and when compared to the usefulness of such information, you will simply come to the conclusion that it is a waste of time. You can't possibly use such information for anything other than put those users in your ignored list because even if you report them to the campaign managers, you will indirectly be saying that the managers are not doing their job well, which is totally wrong because campaign management job in this forum is highly competitive and to survive as a manager, it means you are doing extremely well in bringing value to the company whose signature you manage. What you can simply do is to report any post you found to be spam to the moderators.