Any organization with the intent of adding useless content to the wiki serves no purpose. Spam obscures real discussion and creates longer load times.
Since the line between discussion and spam can be a fine one, each potential spammer should be evaluated on a case-by-case basis. A few things to look for in your evaulation might be:
- Single word posts in discussions
Any individual that is deemed to be spamming should first be given an individual warning by an admin. If the spamming continues, that person should be treated as any other wiki vandal.