In short-no I don’t think that idea is practical-interests, curiousities and knowledge of the users here are broad and diverse, which at its essence, is what makes this site fun and unique, compared to narrowly-defined user groups or custom-tailored discussion forums.
I’ll spare you on the explanation of the underlying concepts of RSS-feed web sites (you can wiki that one yourself), but the format gives you the option to navigate into the ‘article’ for further reading (the discussion thread) if you’re interested in proceeding.
I have to agree with you on the point that questions like you’re describing come up often, and I have pondered the same solution (maybe even suggested it to the Fluther gods myself at some point).
But If it continues to be a problem for you, I say don’t worry about it, just do like you do when you watch the 900-bajillion plus cable tv channels out there-change the channel, or as others have suggested, ignore the topics that are ‘silly/useless’ (as you put it).
Folks use this site for many reasons-learning, entertainment, information sharing, and even bonding and forming social networks-which is why I think Fluther ROCKS so hard…
Just embrace & enjoy the collective and you’ll be a lot happier (works for me at least)...‘nuff said :)