Well, the milling mom's (there won't be a million, so they'll be milling around aimlessly) will be able to say they had an impact. After all, less guns were sold than usual at the time of the march (and beyond?).
Of course, the real reason will go unreported.
Did they get AR-15.com, too? I get "connection reset" notices every time I've tried to log-in since 5/10. Also, why won't the reply form here remember my name and password like it used to? I've only been registered about three months. Did it all expire or something?