If the ToS stated that you are not allowed to play the game blindfolded, minimized, muted, etc then I would agree. However, that isn't the case. If they banned someone for missing /tells because they are crafting while watching tv, etc then I would only blame SE. I'd blame them twice in fact. Once for banning someone for doing something not against their own rules and once for creating a grinding method that can be accomplished with no thought, effort or attention.