I have been bugged by alot of door-to-door salespeople lately. If you have have small children you know how this irritating sales tactic becomes downright vexing when they ring the doorbell at nap time!! Anyway, I couldnt find a decent looking "no soliciting" sign, so I remembered my garden markers and came up with a solution!
Acrylic Paint Pen (Elmer's Painters, black fine point. Mine is from JoAnn Fabrics- $3.99.)