I'm going to slow down traffic in the fast lane
Why do you want to slow down traffic?
I hate people in the fast lane. They move too fast when I'm in slow lane
The fast lane is for people on the move. It is going to make them angry if you are going slow in the fast lane. You should move over at least until they pass you.
Traffic in my lane is way too fast for me. I'm going to let them deal with the consequences.
I would be very careful, you never know who you can anger doing this and it could turn dangerous. Just move over to the slow lane and don't let other people driving fact bother you.