I agree that there's a real push-and-pull between people trying to be responsive to content that is in some way damaging to other people (props up stereotypes, promotes some kind of violence, false information that sounds plausible but could get someone hurt, etc.) and those who would prefer leave content as it is and turn up the volume on some other type of corrective measure, like annotating clearly untrue content or information that has been proven false.
That said, I'm not convinced that one side is winning such that we'll end up losing primary sources. I was disappointed see episodes of "Community" pulled from Netflix and Hulu (one recent example) but the episode remains on DVD, saving it from the proverbial "memory hole".
I don't think anyone should be convinced of the veracity of information simply from seeing it linked to another page. Surely we have to click the link and then judge the source for ourselves.