Specifically the last 2 years. Now, can you tell us a major technological difference between 1982 and 2013?
The evidence is in the actions of its members. If you don't like that they present that image across various states, various schools, and various regions of the US, you're welcome to challenge it. However, that's what they've unquestionably presented in the age where their actions can be recorded by
anyone.
Facts and Figures - Sigma Alpha Epsilon
With your obvious
mistake aside, there is no secret to keep. The organization has had other incidents which didn't really make the news:
Oklahoma frat’s racist chant highlights the exclusionary roots of Greek life - The Washington Post
So in short, there is no secret. Its well established that
this fraternity's chapters
do these things. However, let's say there was some secret: Why would it be relevant to say that a SAE chapter in the 1930s Alabama attacked black people? It wouldn't even make the front page. Why would it make the news if a fraternity chanted racist slurs in 1950s South Carolina? It wouldn't. The closer we get to iphones and cameras in every cellphone, the more these events show up. Coincidence? Nonsense.