I feel like I should bookmark this thread so I can come back in a few years when this dude is huge and say "Geez, I bet you wish you kept your yap shut" to all these people telling him to reel his ambitions in.
I still smirk at the chucklehead who dismissed Drew Houston when he "Show HN: Dropbox"
It's not the concept of defence I was commenting on. It's the nastiness.
As for condescension: that's in the eye of the beholder. When the OP said "Let me know what you guys think of the idea and if you see any potential pitfalls" do you think that was a mistake to ask for feedback? Should they have only asked for affirmation?