Well, it took few month, but I finally got some spamer on my Media Wiki site. Look like it's an automate spambot that change few of my page every night at the same hours.
Usually, it change page with invisible text that add Casino, porn and other link to the page, which have no relation at all with my site.
My Media Wiki is protected from anonymous user change, but the Spambot just make new username every time. I'm a bit sick of banning each username each morning and make revert to the page.
Is there any way to block that kind of attack ?