A couple of recent articles on PR stooges should give you a decent head-start.
David Traynier deals with bought professors, viral marketing and other routes to your unwitting mind, while
Ellis Sharp reminds us of the role of right-wing 'philosopher' and wine commentator Roger Scruton as a hack for tobacco. When you look at what 'contrarians' will say in the weekly newspaper columns for free, you wonder for a second why they bother. But you don't take risks when you're seeking to ensure a reasonable market share and a profitable realisation on investment.