Maybe use the minifig heads from the library? Or let the user state any .dat in their profile images are already there if I'm not mistaken.
This avoids the copyright issue Max mentioned (Although he might be a bit paranoid. Go to any site, avatars will be 99.99995% based upon copyrighted material one way or another).
This avoids the copyright issue Max mentioned (Although he might be a bit paranoid. Go to any site, avatars will be 99.99995% based upon copyrighted material one way or another).