I highly doubt that... more likely they made the not unreasonable assumption that purge is not someting that should be regularly needed. With the coming of UCP they were wrong, but they are often wrong.
HumansCanWinElves, it looks like the notice was added by Plover-Y who somehow had staff status for 1 week? I am not sure what that is about but I wouldn't consider the notice to mean staff require it to be used in personal JS only. Do you have some other source of info for that claim?