"Smart Horn Technology"

After taking a road trip to Idaho last weekend I have decided that "smart horns" need--absolutely NEED--to be developed.

I should start by defining this:
Smart Horn: a car horn with the ability to target a specific car, and only that car.

examples of drivers for whom this sort of horn is intended:

• the car that is 4 cars in front of you, in the fast lane, is going 15mph BELOW the speed limit!
• the car behind you that is ridding your bumper
• the car that came from behind you, weaved in out, cut everyone else off, and is now 7 cars ahead of you

$50,000,000,000 to the person who develops this, so that the next time I find myself in one of the situations listed above I can voice my displeasure LOUD and CLEAR with out offending the people directly in front of me who have nothing to do with it.