I first read about this on Madman's Cafe, as the victim is apparently a very skilled KOF13 player. (Professor at Madman's refers to him as the top Terry player in Japan.) Actually, I'd earlier heard that something had gone on involving the anime Kokoro Connect, but since I didn't care about the series, I didn't follow up.
Short version is that it became public how people involved with the anime series Kokoro Connect tricked and humiliated a minor voice actor. It all ended up pretty ugly, and the fallout had apparently led to a boycott of the anime series as well as other things.