First of all.
I laughed at Curtis Trolling.

Second.

Only in the US you need to register copyright if you want to use it for example in court.

In fact you can also just use http://creativecommons.org to copyright your work.
Most designers don't copyright their work on every single work they do.
They only copyright the work which they knew are good enough that other would steal them.
Atleast thats how I do it and my colleagues.

Even trying to copyright those graphics makes me laugh so hard xD

First of all. I laughed at Curtis Trolling. Second. Only in the US you need to register copyright if you want to use it for example in court. In fact you can also just use [url=http://creativecommons.org]http://creativecommons.org[/url] to copyright your work. Most designers don't copyright their work on every single work they do. They only copyright the work which they knew are good enough that other would steal them. Atleast thats how I do it and my colleagues. Even trying to copyright those graphics makes me laugh so hard xD