Comment 1 for bug 236774

I've seen several cases where users had good reason to change the name, but fully agree that such a change should be associated with a very strong warning.

It's also worth noting that in addition to the set of issues with name changes inside LP, the increasing use of OpenID for other services further complicates things. While the scope for pain is potentially infinite, things of direct interest to many LP users might include access to various wikis, Ubuntu development support sites (e.g. summit, revu), etc.