Check box in admin : what the guest can see in profile

I organize contests on my site ... and I ask user to put them their NAME / FIRSTNAME ... but the only way is
1. to add in viewtopic under IP (when admin) add the field NAME : I see directly if the user has put his name to participate
2. to erase the line in profile.php when a member sees a profil (to prevent from seeing name field)

That's why it would be great to have an option to "choose" what appears or not in profile.php and viewtopic.php

All configurable : if a punbb user wants on its forum only the AVATAR + PSEUDO, it disables in admin the other options ...

Interest ? Prevent from editing the core code when a lot of updates of PUNBB come ... and do them again

Thanx !