The editing they do in self preservation is understandable, and far less wrong than having to kowtow to political pressure and private influence; archive.org is great, but unreliable in ways that archive.is et al are not. They're both very useful, in complementary ways.

I even think what archive.is did to their detractor was understandable - in poor taste, definitely black hat, don't do stuff like that, immature as hell, but hey, I get the human impulse that led to the bad decision, and I'm not gonna base whether I use the site or not on that.