My picketing would look like this: I'd sit quietly across the street in a lawn chair holding a sign printed on both sides that both directions of traffic could see saying, "Got Questions? Jehovahs-Witness.com Has Answers." while drinking a nice tall, cold glass of iced tea.
It may or not be effective at all, but it just may get someone to check into this site who never would, otherwise. I'd also smile, wave, and say hi to the JW's that look.