If, for example, one was to use some of my fellow denizens of Reddit, I might follow BritishEnglishPolice because I like his wry sense of humor. However, he spends an awful lot of time in the programming subreddits, and those often have nothing of interest to me.

For another example, take Derek Lowe:

http://pipeline.corante.com/archives/things_i_wont_work_with...

Now, I love seeing a new "things i won't work with." however, 95% of Derek's writings are devoted to the vagaries of OChem "inside baseball": http://pipeline.corante.com/

On Hubski, I'd love to follow #Derek but block anything he tags, say, #insilico: http://pipeline.corante.com/archives/in_silico/

In two hours, you've got three users (make that four, including me) saying "I want it to do this." Your answer is "I don't want to do that for the following reasons." Okay, fine - but you need to recognize that we want something, and adoption is likely to be better if you at least give us a mechanism to get what we need, rather than saying "eat your peas, dammit."

It comes back to tags - your users are expecting one thing, and you keep insisting on another. You don't need to kowtow to the mob's every whim, but when the same issues keep coming up, you might want to accelerate your timetable for dealing with them.