[Mailman-Users] Forcing users to enter real name in listinfo page subscribe

I'm changing one of my mail lists in preparation for moving it to another host which will be running Mailman with unmodified Python code underlying. One of my changes is to replace a custom listinfo page which routes subscription requests outside Mailman to the standard Mailman confirm-and-approve form. We will be able to run with a customized listinfo.html page.

The template listinfo.html line for entering the applicant's real name is: <td bgcolor="#dddddd" width="55%">Your name (optional):</td>

We would like to make that mandatory. I can remove the (optional) from the HTML, but is there a way in the HTML to make Mailman reject a blank response?

Hank