I happened to discover that the special Label [no label] "(Special purpose label - white labels, self-published releases and other “no label” releases)" has no less than 40 aliases. In the list are such gems as "℗ 2012 Jungle Doctors" and "INDIPENDANT".
It looks like 16 of the aliases were intentionally added. Some (like "N/A") appear to be search hints to improve the discoverability of [no label]. Some (like "[самиздат]", i.e. "samizdat") appear to be back-door translation of the MusicBrainz application.
Many of the aliases seem to have come when bogus Label entries were merged into [no label]. It seems various editors (and maybe an iTunes import script) created a new bogus Labels in the course of adding self-published Release, instead of discovering and using [no label].
How did I discover this? When I downloaded the XML file of metadata for a [no label] Release, MusicBrainz supplied an XML entity for each alias. Probably correct behaviour, but it is a respect in which these aliases are a little annoying.
Would it be reasonable for me to delete, say, 20 of the aliases which resulted from merging bogus labels? I don't know enough about the workings of MusicBrainz and of merging to know if deleting a post-merge alias would hurt something.
Or is it wiser to leave this pile of debris untouched, because it only rarely becomes visible and annoying, and because we can't be sure that deleting it is benign?
Thanks for your wisdom.