I'm going to disagree. Any debate about definitions is fundamentally about power. There's no real reason why a word means one thing and not another. It's inconsistent to be frustrated with one group for insisting on a definition ("family values" means heterosexual couples and their progeny) and not be equally frustrated with other groups for doing exactly the same thing ("marriage" includes same-sex couples).

I'm willing to be wrong on this point if someone cares to enlighten me. I find it sad to conclude that power struggles are inevitable. It's better than violence, but still distasteful.