There are no shortage of admins who run bot-assisted
deletion tools
and uncritically accept any tag placed on an article as valid without
pausing to read, which effectively means that a bad tag won't get
challenged.
One, who I remember writing to this very mailing list about almost
exactly ten months ago, was running at three deletions a minute for
over an hour with something like a 4% rejection rate. There's got to
be false positives there, and no shortage of them...
I remember that. There was much outrage and, as far as I know, the
admin in question stopped (or was stopped). Do you know of anyone
doing it since? If so, you need to report them and get them
desysopped.