The only reason I'm responding to this is the post was marked as offensive.
I think Arthur doesn't have his profile filled out is because he prefers internet privacy, which is perfectly fine with me. If I need to, because of webmaster duties, I can find out more about a poster via their digital fingerprints, but that is very rare thankfully. As for everyone else, there are no rules about filling out the profile except you must put your location in, but it can be very regional for privacy reasons.
I think Arthur doesn't have his profile filled out is because he prefers internet privacy, which is perfectly fine with me. If I need to, because of webmaster duties, I can find out more about a poster via their digital fingerprints, but that is very rare thankfully. As for everyone else, there are no rules about filling out the profile except you must put your location in, but it can be very regional for privacy reasons.