To counter that, I use another strategy: Threat. I say “If you keep rephrasing like this, I will pour acid on the roots of a tree until it dies.” And they know I am capable of it.
At least it has the effect of snapping the person into stopping his NVC and actually telling me he/she has no intent on solving the issue which, as an Asperger, is much easier to deal with, because I can quit, deal with it another way - at least the cards are on the table. I can’t stand social games, and NVC became so misused by polite-agressive people that it became a social game.
I feel sorry for the people who invented NVC, it’s certainly not what they built it for.
Kelly Bryson ("Don't be nice, be real") mentioned how he experienced Marshall Rosenberg being quite torn about teaching people to be overly empathic as a habit. Kelly recommends radical honesty as an antidote to that.
It helps to be a Jungian personality type that has a strong focus on the feeling cognitive function, i.e. Fi/Fe. If that's not you, then empathy/sympathy will probably not come natural to you.
Also, I have personally found that a very refined culture of giving and receiving empathy is found in the Non-Violent Communication (NVC) "universe" created by Marshall Rosenberg.