The hacker group "DERP" claimed responsibility for DDoS attacks against multiple games and gaming services which included League of Legends, EA.com, and Battle.net. While all of the mentioned sites were only downed for a short period of time, the real target of the attacks was a Twitch streamer known as Phantom L0rd.
According to a Reddit thread, the group decided to harass the Twitch member for the "lulz"of it.
More from Reddit:
"A group called DERP is apparently DDoSing League of Legends NA/EU/OCE servers. They also took down Dota 2, Club Penguin, Battle.net, EA.com. They are taking down whatever game Phantoml0rd is playing (or perhaps, trying to play rolf). Most recent event is Phantoml0rd playing on OCE with stream fans and they took it down. On behalf of the League of Legends situation, it seems like they are directly attacking Internap network, Riot's service provider."
The group escalated it even further by posting PhantomL0rd's personal information online, and calling the local police to his house claiming that a hostage situation was occurring. Police showed up with automatic weapons and took Phantoml0rd into custody briefly. Here's what he said about that:
"Just had an automatic pointed at me, put in hand cuffs, and sat in the back of a cop car as I watched as 6 policemen go through my whole house." He later posted that the situation had stabilized: "I'm good guys. More updates soon, promise."