One thing I've learned is often times when people post a snarky comment like the one you replied to, they think they are talking into the abyss. Replying with some maturity and respect can often unmask the non-snarky person they actually are and make them feel bad when they realize what they said actually was towards a person who exists and is affected by their words.

What you did instead was insult them back and now you can be sure they will not have anything nice to say about your company. To do it on a place like Hacker News is quite shortsighted since you never know who you're talking to or who is reading your posts.