How badly do you want to win? Enough that you'd pay to strap on a gaming headset that shocks your brain? Maybe that sounds insane, but then again, many of the things people do to gain an edge in multiplayer games are ridiculous.
You might be familiar with more 'tame' practices. I for instance have totally bought special controllers to play stuff online—specifically, Razer controllers for my Xbox 360. Why not? They offer a better experience than the 360's original controllers thanks to remappable, mouse-like buttons and a decent D-pad. Still, the MLG tends to ban controllers like it—and although I'm not interested in going pro or anything, the way the controller allowed me to customize the experience did allow me to play better. Whether or not that's taboo is arguable (hey, PC gaming lets you customize to your hearts content...). But did I buy it so that I could win a little more? Totally.