On wikipedia, no one owns specific pages. A Kappa Sigma brother has just as much right to change the page on Delta Sigma Theta as they do the page on London Bridge or Nitrogen. See
http://en.wikipedia.org/wiki/Ownership_of_articles .
And as for challenging the changes on "Gamma Sigma Sigma", the only info that I had was that the person's username was "GSSmarketing", someone completely unrelated to GSS could have taken that username and the changes were unreferenced. See
http://en.wikipedia.org/wiki/Wikipedia:Five_pillars and
http://en.wikipedia.org/wiki/Wikipedia:Citing_sources and without referenced sources, everyone is a potential Wikipedia Perp.
In fact, one of the tenets of Wikipedia is to avoid Conflict of Interest, see
http://en.wikipedia.org/wiki/Wikipedia:COI . In that regard, on controversial topics, members of groups are discouraged from making edits to the pages of their own groups... As a member of a GLO *other* than Kappa Sigma, I'm actually viewed as a relative neutral on the issue.
And monitoring every Greek Letter Organization page neither interests me nor do I have the time for.
If you have issues with the rules on Wikipedia, that's one issue, if you have issues with whether or not my actions on Wikipedia fulfill them, that's another. Just let me know.
In terms of point or audience, If I had gotten a PM saying "According to Hank Nuwer, the only two were UVW sorority in 1952 and XYZ sorority in 1983." I would have considered the question completely answered and not thought anything less of either UVW or XYZ sororities.
Within the last two years, one of the threads that I started was "What do you call your National Officers", or something like that. These two threads both come from personal curiosity and in each case, I would be willing to answer to the best of my abilities the same question about my own fraternity.