Try towing a boat or trailer all the time.

I can't count the number of times I've had a car try and merge over between my truck and whatever I'm towing at the time.

They see the truck go by and don't even look before they start to merge.

How about the jackass that assumes that because I'm towing a trailer I can't be doing the speed limit and have to try and get ahead of me at all costs. Pull right out in front of you. Not real smart to pull out in front of someone rolling down the road at 20k combined.

Then the people that think that being 3' from my rear bumper is going to make me go any faster. I usually upshift a gear or two and lug my Cummins for a few seconds. Roll into the throttle again and before the turbo spools they get a nice taste of thick black exhaust. They tend to back off in a hurry.