I am angry about everyone who has ever been beaten up in a dark alley. I think people should not be beaten up in dark alleys. I am angry about racism and sexism and homophobia and transphobia because they seem significant causes of people being beaten up in dark alleys
I agree they "seem" that way if you only superficially read the news. If you pay closer attention one notices that (at least in the US) fear of being precised as "racist" is a much larger cause of people being beaten up in dark alleys (and occasionally in broad daylight). It is the reason why cops don't want to police high crime (black) neighborhoods, why programs that successfully reduce crime (like stop and frisk) are terminated.
Hatred of human beings is almost never appropriate. Hatred of things is fine.
I would argue the exact opposite. Hatred and anger evolved as methods that let us pre-commit to revenge/punishment by getting around the "once the offense has happened it's no longer in one's interest to carry out the punishment" problem. They do this by sabotaging one's reasoning process to keep one from noticing that carrying out the punishment is not in one's interest. Applied against things, i.e., anything that can't be motivated by fear of punishment, all one gets is the partially sabotaged reasoning process without any countervailing benefits.
In fact, I don't think it's possible to be angry at a 'thing' like a disease. In order to do so one must either anthropomorphize the disease or actually get angry at some people (like say those people who refuse to give enough money to research for curing it).
A few notes about the site mechanics
A few notes about the community
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A note for theists: you will find the Less Wrong community to be predominantly atheist, though not completely so, and most of us are genuinely respectful of religious people who keep the usual community norms. It's worth saying that we might think religion is off-topic in some places where you think it's on-topic, so be thoughtful about where and how you start explicitly talking about it; some of us are happy to talk about religion, some of us aren't interested. Bear in mind that many of us really, truly have given full consideration to theistic claims and found them to be false, so starting with the most common arguments is pretty likely just to annoy people. Anyhow, it's absolutely OK to mention that you're religious in your welcome post and to invite a discussion there.
A list of some posts that are pretty awesome
I recommend the major sequences to everybody, but I realize how daunting they look at first. So for purposes of immediate gratification, the following posts are particularly interesting/illuminating/provocative and don't require any previous reading:
More suggestions are welcome! Or just check out the top-rated posts from the history of Less Wrong. Most posts at +50 or more are well worth your time.
Welcome to Less Wrong, and we look forward to hearing from you throughout the site!
Once a post gets over 500 comments, the site stops showing them all by default. If this post has 500 comments and you have 20 karma, please do start the next welcome post; a new post is a good perennial way to encourage newcomers and lurkers to introduce themselves. (Step-by-step, foolproof instructions here; takes <180seconds.)
If there's anything I should add or update on this post (especially broken links), please send me a private message—I may not notice a comment on the post.
Finally, a big thank you to everyone that helped write this post via its predecessors!