I've no idea if it's real or fake... but whatever the case may be, the DMCA is a crappy and poorly thought through garbage that only applies to USA.
I totally agree, it is REALLY Crappy of them to even try to take them down. In my opinion I think that is some smaller company that is trying to compete with them and they are losing (obliviously) to R4, and they are just trying to take them down with a bunch of FAKE threats to try and scare them.
Maybe one day there will be peace in the Homebrew World.