As someone who has taught himself development after more than ten years in entrepreneurship, marketing, advertising and strategy, I find you arguments too simplistic, with no regard to strategic tradeoffs. A successful business needs to be able to "fire" some of its clients to gain competitive advantage or increase operational efficiency. And sometimes those clients are users with old browsers.

Branding a request for proofs to general, overarching statements as personal prosecution (Spanish inquisition, really?) is a sign of discourse grounded in ideology, not practical considerations.