After enough of his trashing everyone I think you should have called him out. My typical response to jerks is a disgusted look and tone saying something like, "hey, why not just knock it off and leave everyone enjoy their day..." At least I then know I am making an attempt, and go from their.
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FB4K - Every October we wrench on donated bikes. Every December, a few thousand kids get bikes for Christmas. For many, it is their first bike, ever. Every bike, new and used, was donated, built, cleaned and repaired. Check us out on FaceBook: FB4K.
Disclaimer: 99% of what I know about cycling I learned on BF. That would make, ummm, 1% experience. And a lot of posts.