here my story: i host about 10 websites with mediawiki. i noticed some anonymous guy from france spamming in Current Events with all the span crap hidden in a very small div. My reaction was to delete everything and install a spamblocker (no more anonymous login / the extension etc...) All wikis were spammed and after doing some research myself in the net, i found a lot of other beginners wiki spammed too. The ranking in google dropped from 4 to 0 within one week, even having removed all the crap. Now i realized that google also look in all the versions and deleted pages !!!!! So here the question: How can i remove safely all spam in the database without leaving any link to a version. Can i just delete the blob in mysql? Thanks for helping. unfortunately all wikis are going to be abused that way, even reacting immediately the ranking drops because of the versions!!! Thanks for any hint Andres