Oh dear. That is a bad sign. It has always seemed to me that building a healthier community from the ground up was the biggest thing a successful new Lisp would have to offer. The behavior you describe is all too reminiscent. No one should ever be "actively laughed at" for asking an honest question, and Clojure experts (if they know what's good for them) ought to take an aggressive stance against that kind of behavior. These communities are delicate things. They can become diseased.
It makes me mad to see anyone get "actively laughed at", let alone by bullies who assuage the beast of their own insecurity by doing the intellectual equivalent of beating up children.
Edit: oh, and: they're being laughed at for asking about macros? This is a Lisp, right?
There's no value in such arguments tho. It's an undeniable truth that the Clojure community (and its libraries) are far less macro-friendly and macro-centric than other lisps. Even PLT Scheme seems more comfortable with defmacro usage.
Edit: I'm not talking about trolls, though, but about respected members of a community acting this way. If bullying is confined to trolls, along with all the other bad things trolls do, that's a healthy sign.