A web site calling for the boycotting of Sinclair lists known advertisers in local markets and their contact info. You can search by market and see what local businesses advertise on Sinclair stations, call them up, and let them know you won’t tolerate Sinclair’s Swift Boat-like political attack masquerading as news programming, and they shouldn’t be paying for it. The site asks for anyone calling advertisers, though, to be polite about it…