Boy, sometimes I felt like doing that with my tag, but I never had the balls. :) Of course, I wouldn't expect it to really work. There's something weird about the system so it requires a bunch of conditions for a successful read. But just the satisfaction of shoving crap in the face of someone who says they can't smell it... that would feel so good. :) Everyone else was pissed at this guy for holding up the lane, but inside, I was cheering for him. :)
By the way, when it came my turn, my external pass read just fine. I think it's something about internal tags used in older vehicles like my old van and this guy's old-looking pickup.