When I ask folks to name which salespeople they believe use the hardest sales tactics, I hear the usual suspects. Almost without exception, car salesmen are mentioned the most.
I then suggest that there is a sales group that is more hard core than car salesmen. These are people with whom you'll avoid eye contact. When you see them, you'll wait until they are distracted and then try to sneak by them. You'll even pretend you're not home when they ring your doorbell. No car dealer ever knocked on your door on a Saturday morning!