Anyway, due both to the increased server load and the safeguarding of the databases, and the confusion caused by name changes of long-standing members, it has been decided that from now on there will be no more changes except under exceptional circumstance. Which includes stalking fears and harmonization with other boards, but for both of which some proof may be required. Such requests will only be considered by a PM to any admin who will bring it before committee.
The biggest reason is a bunch of "nasty" SQL queries have to run on the DB servers, and the database for the forum is just getting too big. In some cases, a username change can seize up (meaning no one can use that server for the forum) a DB server for 5-10 minutes. Forces a few full table scans on many gigabytes of data.