Thread:Project:Support desk/Is this extension safe/stable, also, could someone please evaluate the stability of it?/reply

Hard to say. At least it is not used by the Wikimedia Foundation, which means that noone has to keep it current. The last release also is from 2007. So my first question would not be if it is stable, but if it still is working with current versions of MediaWiki at all. As for the "non-existing user" question: I guess the easiest way would be to just try out. Don't forget making a backup before...