This idea came up while I was admin at least once. While it is a good policy and constructive in maintaining forum integrity, I cannot in good faith recommend that as a rule.
Some people have situations relating to stalking or other potential assaults or hazards that can result from being "found" on the internet. Fortunately, I do not fall into that category, so I don't mind having my name, etc, out there. But not everyone is so lucky. There are considerations that others on the forum have to deal with relating to geographical/class/religious concerns that could mean harm to them if personal info was divulged.
From that point, I do not recommend mandatory disclosure. But I feel that everyone that can (without putting themselves in danger), should. FWIW.
I do agree that everyone's martial arts profile should be filled out, regardless.
"In case you ever wondered what it's like to be knocked out, it's like waking up from a nightmare only to discover it wasn't a dream." -Forrest Griffin