Voted number 2. The funny thing is that dd and I just had this conversation yesterday while driving to Woods Hole on Cape Cod from central Mass. We were on 495, a three lane highway. Traffic was moderate. The car in front of us started moving left, into the far left lane (passing lane)..as he was straddling the dotted line he put his directional on!!! Ah yeah, we kinda figured you were moving left!!! My dh does the exact same thing...drives me nuts.
If you look and can see there is a space, then put on the directional, and then move over. If traffic is heavy, I put on the directional and wait for an opening. Dh says that's crazy...no one is going to let me in. It's much better, he seems to think, to just bull your way into the stream of cars!! I say that annoys others and leads to road rage!!!
And that whole 'lane ending, merge' issue??? Drives me nutty when the vast majority of cars are lined up, moving slowly as you come to that merge, and you have a car or two that speed up and drive like a nut until the last minute and then try to move into the line of cars. Sorry but that's not how is should go. Yes, if every car lets in one car, then it works beautifully. But most drivers don't want to let that one car in. It would be so nice if those in the merge over lane would start their merge much earlier, rather than waiting until the lane goes away.
And in Florida?? I'm not sure they even put directional signals in the cars down there!!!! After a week of driving in Florida, I return home to Mass and seldom use a directional. It is truly a case of 'too much info to the enemy' down there. Or, they just make such fast decisions that they have no time for directionals!!!