Season Six of the HBO drama Game of Thrones is only half over, but so far it has featured several major plot twists, including life-or-death moments for beloved characters.  When is it OK to talk about Jon Snow without whispering? Today, we debate “spoiler etiquette” when it comes to talking about addictive serialized dramas with friends, family and co-workers.  We talk with Tricia Bobeda and Greta Johnsen, co-hosts of the WBEZ podcast Nerdette Recaps Game of Thrones With Peter Sagal. (Caution: This segment contains spoilers!)