I like it because it provides a convenient way for me to know something about the poster. During my first year as a PerlMonk, I have frequently clicked on the poster's user name link to find out the user's level. I have used this information as a guide when preparing to post a response. For example, if a Seeker of Perl Wisdom posts a question, and I want to propose a solution involving the split built-in, the level of detail I provide may vary depending on my perceived experience level of the poster: for a veteran monk, I might decide just a link to the "split" documentation is sufficient, whereas for a new monk, I might decide to describe how to search for the documentation and then show a few simple code examples.
In theory, the level of the poster should not determine the detail of the response. But, I have found this to work well for me in practice.
This added convenience may be appealing to other newer monks as well. In time, I'll probably decide it no longer has any value to me. When that happens, I'll disable it.
<code> <a> <b> <big> <blockquote> <br /> <dd> <dl> <dt> <em> <font> <h1> <h2> <h3> <h4> <h5> <h6> <hr /> <i> <li> <nbsp> <ol> <p> <small> <strike> <strong> <sub> <sup> <table> <td> <th> <tr> <tt> <u> <ul>