When you receive a handwritten letter addressed to you, you get a feeling that a sender cares. When you read such a blog post, you get a feeling that the author has nothing better to do.

But what a great idea nevertheless - proof of care! Instead of checking if you are human and not a malicious bot, they shoud require a proof that you do care about what you are going to access. Like - I don't know - write by hand on the screen a short essay on how accessing the site will make you happy.