How do you feel about me, me, me road hogs?

I was driving in the left lane of a four-lane road. A woman in the right lane was stopped dead signalling for a left-hand turn. She then cut across in front of me and pulled her big old SUV right across my lane blocking my forward progress while she sat waiting to get clear to pull into the traffic lanes going the other direction.

It just struck me as so wrong. So she had decided she was going the wrong way. She stopped dead, blocking first one lane (the right) and then the other (the left), because she felt she was more important than anyone else on the road going anywhere.

Would you do that? Do you honk at people who do stuff like that?