I'm going to tailgate/honk at 'christmas lights drivers'
Why is it that you thought about doing that to them while driving?
I'm thinking about doing that because the drivers drive slow in the left lane, it makes me frustrated.
I can understand how it makes your frustrated, but if you are looking at lights too then you shouldn't worry so much. You should be courteous of other people. You can always go around them instead of being rude towards them.
I don't care they need to get out of my way.
You need to respect the rules of the road. Road rage is a crime and dangerous for everyone around you. You can take a different route if you need to be somewehre.