[Catalyst] Wiki spam

[Kiki]

The wiki got spammed too (about 2-3 hours ago). It's a weird kinda spam:
invisible (by css) "googly" referral links spam. Looks like the work of
a not too bright bot (only standard trac wiki pages got spammed). The
spammers IP address is: 212.106.129.12. Disabling anonymous edits was
considered but not enforced due to the inability of the Trac wiki to
allow automated sign-up of users.

For those who are curious, you can see the spam in the next to last diff
on the PageHistory of these pages:

    * RoadMap <http://dev.catalyst.perl.org/wiki/RoadMap>
    * TracLinks <http://dev.catalyst.perl.org/wiki/TracLinks>
    * WikiPageNames <http://dev.catalyst.perl.org/wiki/WikiPageNames>
    * TracAccessibility
      <http://dev.catalyst.perl.org/wiki/TracAccessibility>
    * WikiMacros <http://dev.catalyst.perl.org/wiki/WikiMacros>
    * TracQuery <http://dev.catalyst.perl.org/wiki/TracQuery>
    * TracReports <http://dev.catalyst.perl.org/wiki/TracReports>
    * WikiHtml <http://dev.catalyst.perl.org/wiki/WikiHtml>
    * WikiFormatting <http://dev.catalyst.perl.org/wiki/WikiFormatting>
    * TracRoadmap <http://dev.catalyst.perl.org/wiki/TracRoadmap>
    * TracInstall <http://dev.catalyst.perl.org/wiki/TracInstall>
    * TracRss <http://dev.catalyst.perl.org/wiki/TracRss>
    * TitleIndex <http://dev.catalyst.perl.org/wiki/TitleIndex>
    * TracGuide <http://dev.catalyst.perl.org/wiki/TracGuide>
    * TracSupport <http://dev.catalyst.perl.org/wiki/TracSupport>
    * TracTickets <http://dev.catalyst.perl.org/wiki/TracTickets>
    * RecentChanges <http://dev.catalyst.perl.org/wiki/RecentChanges>