I think you are creating more work for yourself and will make maintenance on the database a little more difficult.

http://www.developer.com/db/article.php/3622881/Basics-of-Statistics-in-SQL-Server-2005

That link discusses some of the workings of statistics. Statistics are not always just created on a single column at a time. Typically the engine has a very good understanding of data usage and can create accurate statistics for use by the queries being submitted. If every table has individual statistics created on every column, you could end up with a bunch of out of date statistics that could impair performance.