I think a member's need to change a nickname is directly related to the "temper" of the community. A community of people who want to work, make money and get things done forgives newbie mistakes. A community that only bullies newbies to drive them out of the industry...well.. I definitely see the reason why hiding behind a name and not taking responsibility for your comments.

Ultimately is up to the user to keep their name or make a new one.