Ah yes, 30 fraternities were shut down last month. In a month where fraternities have been more actively targeted than any time ever.
This is either .5% of fraternities according to this link http://www.quora.com/How-many-individual-fraternity-sorority-houses-are-there-in-the-US or .25% of fraternities according to this link http://thefraternityadvisor.com/greek-life-statistics/
WIth new fraternities popping up every day, it’s really hard to not call this isolated.