This is a disgusting perspective. The same people who champion descriptivism conveniently tend also to champion prescriptivism selectively, such as with the transexual madness over pronouns. No, I'm a prescriptivist, and I feel so strongly about it that I'd kill. Languages have rules, damn it, and damn those who disagree with this.
Tell me, do either of us see people championing this for other languages? I don't. I think, if a white man learned Chinese and butchered it, and a Chinese man corrected him, that would be fine. Why is it different for English?
Without prescriptivism, we'll see "Me love you long time" be considered to be as acceptable as "I will love you for a long time" and the very thought sickens me.