Well good thing you started with that since you are clearly not familiar with him at all. He is very very well read and highly involved with the charity.
I dunno: He played a crucial role in a long-term, industry-wide collaboration that resulted in practically every household having at least one computer. And for years he's been devoting his fortune and his intellect to solving global-scale problems. That has gotta be worth some redemptive value for past sins, yes?
I also remember how we laughed when his Encarta encyclopedia tried to sell Bill Gates as widely known as a philanthropist. It wasn't true then, but it is true now. He certainly deserves that credit.
"Antitrust" are the laws designed to break up monopolistic "trusts". So far as I am aware, Bill Gates only ever had costs from any antitrust operation, legal or illegal.