@jim (and, in a roundabout fashion, @kval)
"language is fluid"
Yeah, already the word "Nazi" has softened from meaning "genocidal imperialist" to meaning "exacting, strict, overly precise".
"Grammar Nazi" needs an opposite. Grammar Stalinist, perhaps - makes up their own rules and ostracises any who speak out against newspeke.
Taking fluidity to its logical conclusion: Papua New Guinea has over 100 languages. That's what you get when you allow language to evolve rather than standardise. It becomes a barrier to communication between neighbouring tribes; the first step on the 'us and them' path and wars, every few generations.
Obviously, this will never be the case with English as it is now so international. The sad part is that British English is now just a minority dialect of American English. Language preservationists are not so much holding the fort as patching up a sandcastle… as the tide rushes in.