Wiki spam bot invasion

[valent]

Hi,
I'm not sure if this is something new (look like) or there were previous bot invasions on WIKI?
Not there are bots (maybe even live users?) that put spam links in two most visited WIKI pages, Main Page and Screenshots.

I found these two spam users:
http://wiki.linuxmce.org/index.php/Special:Contributions/Springer342
http://wiki.linuxmce.org/index.php/Special:Contributions/Anstett454

They even pass captcha when because when you add external link to wiki you have to correctly pass captcha spam protection.

Is there some better way to protect wiki? Zaerc are you main wiki admin?

[valent]

How to delete wiki spam accounts?

Wiki is being infested with these idiots!

http://wiki.linuxmce.org/index.php/User:Oeitgipg03oa
http://wiki.linuxmce.org/index.php/User:Wohome32u188
http://wiki.linuxmce.org/index.php/User:Nfljer275it
http://wiki.linuxmce.org/index.php/User:Csyez129
http://wiki.linuxmce.org/index.php/User:Csyez130