Tony Karrer makes a great point about one of the fears people have about Learning 2.0 style tools.
When people consider installing tools that are "freeform", a worry often arises that "bad" content will be posted and seen by users. In this case "bad" could be something untrue, damaging to the company, or just poorly written, confusing or misleading.
Karrer counters this by stating that the individual who posted the "bad" content, is probably already distributing their ideas via email, conversations with associates, etc. Web 2.0 tools have the ability to "shine light" on mistaken concepts by putting mistakes out in the open where they can be corrected.
If your system is to be truly successful, you want your user population to do the correcting themselves.
Karrer points out:
People (especially employees) enjoy the opportunity to find things that are wrong, tell you why its are wrong, and maybe correct them.
It's a natural instinct to correct each other, the challenge is to make it easy and safe to do so.