Nothing wrong, you can organize your own conferences in whatever way you like. ... and you can lose out on the participation of a valuable subset of contributo

Nothing wrong, you can organize your own conferences in whatever way you like. ... and you can lose out on the participation of a valuable subset of contributors. This isn't a moral issue, it's a question of maturity, decorum, and being inclusive. But if you act morally outraged at what others do in the conferences they organize, don't expect much sympathy. Likewise, if you're a socially ignorant asshat, don't expect people to like you. Or come to your conferences. Or invite you to speak at theirs.