From what I know (and I admit a large part of ignorance in this), blind people don't go around saying "I can't do that, I'm blind." Instead, they use all available facilities and methods to work around being blind and function as a normal part of visual society. Seeing eye dogs, helper monkeys, canes, shades, braille, physical contact, speaking loud, developing habitual actions...all sorts of things that mitigate their blindness and help them to fit into a world that is mostly not blind. They take other people's expectations, and they work to meet them. They don't ask that other people change their expectations.
From KenM's posts, he does seem to want other people to change their behavior, at least if they want to be accepted by him. Rather than accepting people for what they are (meaning, accepting people for the duplicitous, conniving, tricky beings that humans tend to be), he wants them to change. He wants girls to stop playing games with him, honesty to govern his interactions, and people to say what they mean to him, because he says what he means to them. Almost like "I suffer from this, so the people who want to be important to me should, too!"
In wanting this out of the world, he wants a fantasy that is never really going ot be achieved. And in refusing to adapt himself to anything but this fantasy, he shoves out the rest of the world. And when you shove out the rest of the world, becoming self-centered and lonely are common reprocussions (as someone who has definately suffered from shoving out the rest of the world in my past, this I know from experience).
If you continually demand that your expectations be met, you will be continually dissapointed. Being dissapointed often leads to sadness and depression ("why is everyone so bad?") or egotism and self-rightousness ("why isn't anyone better than this?!").
Though to a far lesser degree than some of the other posters here, the root ends up being the same, it seems: when you go into self-imposed exile, people today don't generally think you're making a comment on the state of affairs. People today generally think you're being a dick. If you want the world to live up to your expectations, you have to take an active hand in it and settle for small victories. And you can't take an active hand in changing the world by sitting back and making demands of it.