If that family is "icky things that keep the weak awake at night" they might.
Myself, I rather like GCS. Silk production industry is nice for giving lots of dwarves lots of jobs - farmers get to grow dimple cups for dyeing, then you got millers, dyers, weavers, and finally clothmakers. And it's endless, unlike metal or stone (though granted those probably last through the lifetime of forts anyway - stone especially).
Unfortunately after having a couple years of silk farming, my caged GCS disappeared. I think I accidentally atomsmashed it, due to the silk farm mechanism :-/. And I can't seem to get another one to migrate through to be captured.