[Mediawiki-l] Malicious content deleting bots

I too have noticed what appear to be malicious bots deleting content from wikis over the past couple days. From what I have seen they delete page content starting at the first ampersand through the end of the page. Here is one page they hit: http://www.archiplanet.org/w/index.php? title=Notre_Dame_Cathedral&diff=550682&oldid=547840 I have seen this on multiple unrelated wikis which do not require registration for editing. In the above case it was done by a newly registered user with a six character alphanumeric username, as described by the first person to report this on the list. Other instances have been done by unregistered users recorded only by IP number: http://www.archiplanet.org/w/index.php? title=Gunter_Behnisch&diff=550666&oldid=548133 Thankfully they have only hit a few of our pages so far, but we would obviously like to put an end to it before they do more widespread damage. Mike