Just say "this is why we need to break up monopolies like they did with AT&T." If he still won't shut up about it go find a better friend.

Edit: To his point, eventually these giant corporate monopolies get cancerous and start making stupid decisions (like pissing off half of the country permanently.) Now there's room for some competition to form. People need a reason to leave facebook, google, and twitter and try something new, now they have one.

Bezos will learn the hard way that slapping 80 million armed patriots in the face is a stupid long-term move. It takes only ONE idiot to decide to fuck with his private plane or his iced tea or just swing a bat at his head when he's walking around to ruin his life forever.

Just say "this is why we need to break up monopolies like they did with AT&T." If he still won't shut up about it go find a better friend.