Shackleton is such a fantastic name for an experimental dubstep producer, isn't it?
Shackleton the explorer, and not just any explorer, but of the frozen treacherous wastes of the antartic. And it's composed of "shackle" - confinement by metal restrictions - and "ton" - extremely large weight measurement - suggestive of gravitational drag and obviously bass weight, the opposite of freedom and exploration, which nicely echoes the tension between torpor/drag and fluidity/danceability in dubstep. It even sounds onomatopoeically like dubstep percussion - the sibilance of the "sh", the metallic rattle of the "ackle" and the sharply defined consonant ending of the "ton". You'd imagine if you cut up a sample of it you could make a great rhythm out of the parts.
It's almost as if some bands/acts have to be great because they've got such great names - Howlin' Wolf, Velvet Underground, Led Zeppelin, Sex Pistols, Sonic Youth, My Bloody Valentine, the Prodigy, Public Enemy...