You might find The Fantasy of Being Thin interesting.
What insights have you found in odd corners of the web?
As for the Dark Triad, I don't know what's going on there. I tentatively assume that some people like danger, and what attracts some to motorcycles and mountain-climbing can also attract people to mates who have TROUBLE written all over them.
Alternatively, some women choose men like their fathers-- they're imprinted on a bad idea of what a man is.
Also, I hope it's less common in the culture, but some women believe that they can turn a bad guy into a good one by being a sufficiently good wife. I'm not going to say it never happens, but making the attempt can be a powerful emotional hook.
It's clear that how reliable people's survival instincts are (and about what parts of their lives) vary tremendously, and I've never seen a substantial discussion of how the "this is good for me, that is bad for me" sense works.
You might find The Fantasy of Being Thin interesting.
Yes, I am familiar with this particular community. They do discuss some common biases in an interesting way, but ultimately, my conclusion is that they generate their own more severe ones, without adding much clarity to anything overall.
What insights have you found in odd corners of the web?
Well, that could be a topic for a whole book, not a mere blog comment. I'd rather not just drop concrete names and places I've found interesting, since without lots of painstaking explanations and disclaimers, it would send off a thunderous signal of affiliation with all kinds of disreputable people.
Followup to: Do you have High-Functioning Asperger's Syndrome?
LW reader Madbadger uses the metaphor of a GPU and a CPU in a desktop system to think about people with Asperger's Syndrome: general intelligence is like a CPU, being universal but only mediocre at any particular task, whereas the "social coprocessor" brainware in a Neurotypical brain is like a GPU: highly specialized but great at what it does. Neurotypical people are like computers with measly Pentium IV processors, but expensive Radeon HD 4890 GPUs. A High-functioning AS person is an Intel Core i7 Extreme Edition - with on-board graphics!
This analogy also covers the spectrum view of social/empathic abilities, you can think about having a weaker social coprocessor than average if you have some of the tendencies of AS but not others. You can even think of your score on the AQ Test as being like the Tom's Hardware Rating of your Coprocessor. (Lower numbers are better!).
If you lack that powerful social coprocessor, what can you do? Well, you'll have to run your social interactions "in software", i.e. explicitly reason through the complex human social game that most people play without ever really understanding. There are several tricks that a High-functioning AS person can use in this situation: