I recall vaguely there were penalties promised for abuse of the DMCA - how about enforcing that harshly? As far as I know "Winter is coming" has prior use probably as long as we've been naming the seasons. For a start. there will be a godawful amount of peasants to sue who must have interrupted their relentless ploughing of the muddy earth by looking up at the sky and utter that very phrase.
(which somehow reminds me of the "bring out yer dead" scene in Monty Python's Holy Grail :) ).
This deserves very harsh and exceptionally costly consequences. And I'm going to keep a record of the name of the legal idiot who saw fit to undersign this lunacy.