Dont do it - just improve your content.  You know it's wrong to try and cheat the system.  Think about what would happen if you banned from the results.

Look i dont mean to be harsh - but i allways balance risks against rewards.   In this situation - the risk is to high.

Look at your risk vs reward.  The only "risk" here is the time involved in doing it.... which hopefully will not take you long- Even for a large site.  The "reward" is making it easier for search engines to find your pages.  ....And that can only be a good thing - right?