I'd love to see his original letter. What prompted him to whinge about them in the first place?
SA goons really hate Bitcoin, think it's a scam, see it's users as lunatic idiots, think only use for bitcoin is illegal activities and scamming people, and they desperately want bitcoin to fail just to get some laughs at others' expence. In other words, they're a bunch of bored lonely trolls with a glorified sence of justice, and way way way too much free time on their hands. So that's why.
Being a former SA member, from back when there were more sound minds about there, I would highly advise some of them to take a break from the interwebs. Then come back in a few months and just spend some time reading the content that is posted there these days. I believe their take on many of the views expressed therein would be quite different. As I know mine are. Of course, the few years of college and living in the 'real world' after my presense there probably have something to do with my view of the place now as well.
Cheers
Thinking about it a bit more, I think their biggest problem is that it's a clusterfuck of yes-men. The amount of peer pressure and regurgitation of each others ideas pretty much guarantees that everyone will be on the same page, wishing for the same thing (downfall of whatever they feel like laughing about), and I doubt any amount of education will make a difference.