You don't think that users are capable of deciding who is worth following and who isn't, but you expect them to employ "enhanced filters"?
There will always be people who get a kick out of following/friending celebrities, and those who will use twitter for more personal communication or other uses. It doesn't make either behavior right or wrong or more rewarding or less rewarding. But the people who claim that twitter sucks because the interaction isn't personal (or something along those lines) are doing it wrong. They want something specific out of a service but have (possibly unknowingly) set it up to do the complete opposite.
There will always be people who get a kick out of following/friending celebrities, and those who will use twitter for more personal communication or other uses. It doesn't make either behavior right or wrong or more rewarding or less rewarding. But the people who claim that twitter sucks because the interaction isn't personal (or something along those lines) are doing it wrong. They want something specific out of a service but have (possibly unknowingly) set it up to do the complete opposite.