I was more addressing your statement that the subreddits don't necessarily explicitly promote violence, or that reddit being no more or less lax about its rules was a compelling reason to say reddit isn't responsible.
My statement was meant to be
descriptive, not
prescriptive. I was making a statement about how Reddit, and indeed many other internet services, function, not saying that they should function that way. Most major services like that turn as much of a blind eye as possible to what goes on. Not just to negative stuff, but to positive and neutral stuff as well. They try to remain as neutral as possible, taking sides only when forced to because of legal concerns, or out of need to promote and expand their business. Ignoring racism by saying "we don't really pay attention to what is posted there, and the group description doesn't say anything about violence or harm, if you have a problem file a complaint" also allows them to do the same thing to /r/weed420bonghits and remain neutral on drug use/politics, religion, sexuality, etc. Granted, it's unlikely some government is going to go after Reddit for promoting illegal drug use if they ban racist forums, while allowing pot sub-reddits, but there's a long standing history of internet services trying to remain as neutral as possible. Reddit is just another in a long line. Not saying if it's right or wrong, or even if it's the only way to be, just that trying to spin Reddit as "violently racist" because of that means they're also "pro drug use, pro-anorexia (/r/thinspo has 32,000 subscribers!), pro-whatever someone can take to an extreme and harm themselves"
It'd be interesting if /r/theredpill put up disclaimers like /r/thinspo has. "We do not condone or advocate sexual assault, or other illegal sexual activity. If you know someone who has been the victim of sexual assault, contact RAINN." Because we all know that despite the disclaimers, a lot of thinspiration photos are used to fuel eating disorders, and may even be photos of people with eating disorders. Furthermore, a lot of eating disorders are very adept at hiding themselves as just healthy eating (there's a whole emerging category of Orthorexia Nervosa, people obsessive about eating right, and it's hard to tell the difference between that and people just following a fad diet, at least on the surface). And that's the thing, we know that eating disorders harm people, but does /r/thinspo existence rely so much on the promotion of eating disorders that Reddit should shut it down? How much policing are they responsible for, once they're aware that it's doing harm, despite it's disclaimers? If Reddit shuts down /r/thinspo, does it shut down /r/P90X and /r/fitness, too? Because some eating disorders revolve around excessive exercise. Where is the line? If the line isn't at explicitly promoting harm, then what level of implicit harm does there need to be before it's over the line, and how do you put that into a Terms of Service agreement?
As to the Kinko's analogy, I'm undecided if I agree with it or not. My thoughts against it run like this: here we have Staples, which I'll assume is the same style. There, you can just go to the copier and print out your material without the staff ever knowing or seeing it. Hard for them to censor you. Maybe you can make the argument that staff should check materials, but I don't know - I'm uncomfortable with that, though it'd be within their rights. On reddit, of course, everyone can know about and see it. Reddit is more like the hall that the KKK rents out than the shop where they get their materials.
Kinkos has self service as well, but you can also put in online orders where employees may never read what you're printing. It comes out, they put in in a box, slap on a label, and wait for you to show up to claim it. They may never notice the difference between a playbill for a local theater company, and the manifesto of a guy about to bomb a government building. But that's the problem with trying to equate digital with physical, there is no absolute equality. Sure everyone
could see any given Reddit, but most people
aren't going to see, even those in charge of administration. Renting a hall generally requires specific permission. Starting a sub-reddit may not get noticed until it reaches a given size, if ever.