Eli Lake offers up some tips on responding to trolls:
[H]ere is what works. Retweet the hater’s tweet, appending the phrase “I love your passion,” or some variation. This may seem counterintuitive. After all, the hater has just insulted you and you respond with a compliment. But “I love your passion” is no compliment at all. It’s what you hear from someone who is about to disappoint you. It’s what you hear when you don’t get the job.
And here's how not to deal with haters:
On last Friday night's episode of Kitchen Nightmares, shouty chef Gordon Ramsay quit after the delusional owners of the Scottsdale restaurant Amy's Baking Company proved to be beyond saving. After receiving a social media spanking — see, for example, the deluge of one-star rankings on Yelp or the thread on Reddit's /r/cringepics — yesterday Amy and Samy Bouzaglo, the husband and wife team behind the restaurant, fought back on their Facebook account.
Often in all-caps, the owners go after "the Yelpers and Reddits [sic]" and their "WITCH HUNT," calling them "trash," "pathetic," and "OPRESSORS [sic]." As for selling pre-made frozen raviolis that Ramsay 86'd, they rationalize: "IT IS NOT UNCOMMON TO RESELL THINGS WALMART DOES NOT MAKE THEIR ELECTRONICS OR TOYS SO LAY OFF!!!!"