Which is why it makes sense to seek good advice on sites that have better signal-to-noise ratio.

For me this is one important aspect of LW. I can get good advice almost anywhere. But in most of those places I can also get bad advice with high probability. -- On LW I trust people to self-censor before saying something stupid (as opposed to enjoying a happy death spiral), and even if they fail, I trust other people to correct them. It does not work perfectly, but it's better than not even trying.