they already do in some other country like philippines buy the news about the bitcoin is no soo good but not soo bad too.
I am from Philippines and Bitcoin is not advertised on T.V, do you even watch one? The news are about an individual who was scammed by someone taking all of his/her bitcoin from him, is that even called advertisement? I think not, they are even making bitcoin more of a threat to people the reason they are thinking that if they use bitcoin, they might be scammed because of that news.