Brion:
This is not actually true; there's a minor bug with a particular interaction of the pywikipediabot, which I've mentioned to Andre. However anonymous bot edits are really not recommended, and will likely get much harder to do as we look more at closing out spambots.
My attempts to fix this bug failed, and reactions to restricting the bot to only logged-in edits have been positive, so for the time I will consider it a feature.
Andre Engels