Over the years, i've noticed that people IRL are easy to mess with. I would just like to share my findings around, and see what others think and have to add.
You can mess with people by:
Refer to yourself in third person. This is just fun to do, and people get so annoyed for no reason. Replace I with your name and your good to go.
Talking about your favorite games site to a non-gamer, as they won't understand what you are talking about at all. If they try to figure it out, it feels good to know more.
Something similar to this . Or, you can knock on their door and just stand there.
That's one way. Another one of my favorites is to play "Who's on first?" with some one. Or use my logic (which makes no sense to anybody but myself, usually).
I find, singing your name in varying styles and different melodies upsets me. Though, not just your name, for example singing, "My name is so and so, just thought you should know. If you don't I'm just reiterating, my name is so and so." Of course you would want to do this around people who obviously know your name.
You should also make it very clear that you have no shame and are relentlessly cocky and self-promoting within your songs. For instance, "My name is so and so, and I am the s*(#! My name is so and so, and all of you would die without me."