OK PPL is there that many folks here under 8 years old (I'm the only 8 year old in dis biznatch!)? 2012 was a year that most of us has lived through for certain!! This was very much tolerated back then. The frog is dead but it's still a frog that we're boiling, always has been. (Aka, these have always been out there. Everyone just forgot that today is very, very far from yesterday.)
Ain't no D-FENS, just sayin' that what is horrible now was horrible then, but of course, it's no mystery as to how these things 'slipped through' in those days -- everybody just didn't care or know as much about what was horrible, and/or the perpetrators were simply not as popular and big as they became later on.
[EDIT POST-WARNING: To writ, this is in response to people's surprise by how something like this was possible and accepted even amongst members of blooming progressivist circles in the recent past, not in response to people's derision or surprise towards the racist subject material of Megan's tweets/apology, as it is a past we were all there to technically see. The fact that the past can be so easily forgotten is enigmatic to mull -- it is that same past, after all, that has many lessons to teach about growth and how our level of hyper-awareness has risen since.
Now, that doesn't mean everybody does 'grow'. For all we know, Megan can be a low-key cackling prejudicer to this day. But one person's prejudiced acts, thoughts, or behavior do not exist in a vacuum. It exists in part because of the environment that enables it -- and truthfully, a lot of us were also of that environment. Some weren't, but many were. So were a lot of people who champion the brunt of progressivist ideology today. Today it is up to that person to listen to what that new and improved environment is saying. Anyway, that's off-topic a tad.]