It's because everyone is overreacting to this "DERP" group. I doubt it has nothing to do with the blockland attacks, seeing how that Phantom guy hasn't streamed Blockland. Maybe you guys should make a thread for it in Off Topic because I'd really rather not constantly read about that here.
I don't think anyone has any idea though if they are or not.
If you look at DERPs twitter they seem to be very active into DDoSing Gmod servers before this little slew of DDoSings.
They also took out world of tanks and EA online.
I wouldn't be surprised if they were behind it, but I also wouldn't be surprised if they weren't