DUmmies are always posturing about being "big and bad" to "the man". I find the simple, low-key approach works the best.
For instance:
I drove a delivery truck for almost 20 years before I landed a job with the USPS. I had a delivery of Amway to a trucking terminal about 10 miles from my usual route that I simply took because they only got a delivery every month or so.
This particular day, I came in thru the front door, like I had on no less than 4 or 5 previous occasions, past the boss, and into the breakroom, where I would stack the product in a closet. This morning, there were 2 drivers in the breakroom playing cards, and when I turned around, the boss was there in my face. He told me to NEVER come in that door again, to use the side door (at the opposite end of the building) from now on. I said fine by me, but how come it was alright for me to use the front door on all the previous occasions, when the only thing different was he had an audience.
I went back out to the truck (thru the side door) to get the rest of their delivery, and the more I worked, the madder I got. So I left the rest of their order IN THE PARKING LOT, stuck my head in the door, and told the boss, (in front of his drivers) that the next time he wanted to act like an asshole and get in the delivery driver's face, be sure to do it AFTER he gets the total order in the building. The rest of his shit is in the parking lot, have a nice day. The drivers snickered, boss got red in the face and stormed off to his office, and I never had another order for them again.
This really happened, and it's 100 times better than any lame-ass bouncy any DUmmie can conjure.