Yes, driving and gesticulating in an offensive and threatening manner can be interpreted in many, many different ways I've discovered.
For instance, you demonstrate aggression like that to the humvee escorts in Baghdad, they will oblige you by shooting you with automatic fire, without ever stopping to ask what you really meant.
...except you live in jersey. not trying to start a flame-war, but im not sure wantonly slashing tires and stabbing car doors is necessarily condusive to what ETS is promoting. but who am i?
<3