If you are driving along the freeway at night, in the dark and you are about a half a kilometer behind a jeep and you see that the jeep has one tail light out, it is NOT good driving etiquette to start flashing your high beams at the jeep, while speeding up behind the jeep - and then driving behind the jeep while continuing to flash your high beams.
And then when you drive by the jeep you should not just blankly stare at the jeep driver as you go past. Because this would cause the jeep driver to become very, VERY angry. And if the jeep driver was not "with child" and her husband wasn't
In future, unless you can see someone hiding in the back seat of a vehicle with an axe poised above the driver's head, ready to strike - refrain from going nuts with the high beams. It's in everyone's best interest, including yours.