That sounds nice,
tacit, but doesn't one have to know the word/characters in the hashtag before being able to look for "news" that might be related to it? If I create one and don't publish anything mentioning it, how would anyone else learn of it? And even if I post as a Twit, how would anyone know to
search for my hashtag? Seems to me there is a link missing. "Followers"? hashtag listing site(s)?

Obviously, I don't use Twitter or any other non-email/forum sites/apps.
