Earlier quoted context omitted.
I'm not sure what you mean by informed abstainers, but if you mean informed abstainers of Reddit then I can speak for myself. I see Reddit as a self-aggrandizing media outlet. Members generally accept liberal values as status quo. Meaningful discussion imitates base prime time political discourse. Some of my specific gripes are: 1. Racism on Reddit is an acceptable subtext, as long as the subtext is funny. 2. Sexism…
I think it's more that making racist/sexist jokes is acceptable, as long as people aren't offended. Telling racist/sexist jokes is not the same as being racist/sexist.
That said, that doesn't mean that I think it's necessarily appropriate to make racist jokes on a board like Reddit -- it's a textual medium, and depending on the context could be extremely unintentionally offensive to people.
That said, I can't say that jokes of any subject matter bother me on Reddit. There is some actual misogyny, and some interpreted-as-misogyny-when-it's-not drama (and you can replace misogyny with just about any "going to offend people" term here), and it detracts greatly from having useful discussion.
Then again, although the primary purpose of Reddit was useful discussion, it's really more like a pub filled with pretty smart drunk folk. It's a social gathering place, and great stuff can be found, organized, talked about, and done -- but there's also going to be some guy slurring something about his genitalia and women or whatever.