In Van Dorn Plastic Machinery Co. v. NLRB, 736 F.2d 343 (6th Cir. 1984), we stated "[t]here may be cases where no forgery can be proved, but where the misrepresentation is so pervasive and the deception so artful that employees will be unable to separate truth from untruth and where their right to a free and fair choice will be affected."