GROSSSSSSS....
I can't imagine doing that, especially since scarring can be so erratic, it would be hard to say what a brand would actually end up looking like after it fully healed. Add that to the fact that burns are so horribly painful and prone to infection, I would never ever ever get one.
I heard there was a porn star with her sorority letters tattooed on her butt...I think she's a Tri-Sigma? I don't think I'd be too pleased if I were a member of Tri-Sigma nationals!!!