I don't see that as a problem, since the person can decide what is visible in their profile. I don't know whether profiles are visible to non-registered users.
The issue is--if someone uses an alias (and personally, I think more highly of people who use their own name, but that decision may be left to each individual user), it is their prerogative to reveal their name in a public forum, but it isn't really appropriate for someone else to reveal their name, city of residence, address, phone number, social security number, employer, etc.
There is an exception of sorts that we make for this, which is that if someone is posting under more than one alias, particularly if they do so in a way that is disruptive to the community, then the moderators might reveal that fact and let people know that trolls "A," "B," and "C" are the same person.