There's nothing wrong with Chick-fil-A selling chicken with antibiotics, and there's nothing wrong with Mark Zuckerburg being clever about how he spends his money.
If you don't like Chick-fil-A, don't eat there.
If you don't like Facebook, don't use it.
If you don't like the tax code, lobby Congress or do something about it. But don't blame Zuck for being smart within the confines of the law.