Actually, if you spotted a ZTH stickered car and go beside that fella and honk, do you really think he'll know who you are? No offense in that statement but if someone do that to me, I'll think that he's looking for trouble (considering quite a number of malaysians always like to stare cock wan) and I'll pull out my bat and smack that person's car. buahahaha just joking.
Maybe those who have intentions to honk and wave at a ZTH stickered car, it's better to just make a small sign that says "I am a ZTH member" and just wave that to him. hahaha