The thing is, I'm usualy pretty cynical about the people down here on the road, but my actions almost always turn out positive results and in my commute to work I find that most of the people around me are either signalling for me as well or yielding. This is South Florida, too. At any rate, I try not to get too worked up, avoid the creeps and things go well.
Please people, take the two nuerons it takes to fire the impulse to use the damn signal lights. A split second of courtesy may save you from a bad encounter some day.
When you pass me and then immediately pull back over in the right lane directly in front of me, you're forcing me to tailgate you. Depending on the speed difference between my car and yours, I'm unwillingly tailgating you for 10 to 60 seconds, or even longer.
Rude and dangerous, IMO.