I'll say it again: Trolling, at least if it's egregious enough, is reason for reaping. Troll-feeding is not.
I should also remind that the onus for proper moderation is on the one who makes the consideration and on those who vote on it.
three five monks together agree that a node should be reaped, then it may* get reaped.
But what we should never see is a reason for reaping like "troll-feeding", because that's not a valid reason.
If you think the node is trolling, then consider/reap it for that.
What I'm concerned about, in this discussion, is how the term "troll-feeding" is being used. Your example,
so emotional, clever trolling!is not what I would call troll feeding anyway. At least, you can't tell, by itself. It depends on whether it is in reply to a trolling post. I personally would probably vote 'reap' on such a node, because it is, as you pointed out, a zero-value node.