Our vB forum has a strong "reunion" component so from the beginning we've required people to use real names as their user name. Somewhere along the line I set it up to require two word user names (must have a space): Firstname[space]Lastname. On vB it's called "Username Regular Expression." We also manually approve registrations. A side benefit that has been very helpful is that requiring a [space] in the username cut down spam registrations by 99%. So, my question is, does XF support requiring a [space] in the registration process?