A Nielsen report this week revealed that Twitter has an uncanny knack for hemorrhaging users. In fact, some 60 percent of new users bail on the service within a month. For those of us who've been tweeting for a couple of years, this isn't exactly a shocker. Many longtime users have gone through that initial period of wondering what, if any, use Twitter might be. And maybe it's better for everyone if those who don't get it refrain from tweeting until they do.