What I'm saying is that controlling people has its down side as well, and that it's not easy at all. Like being a marshal/sergeant, a lot of people are under your control, but you also have to guide them and be their leader. And that's not easy.
If I could truly teleport, I'd take whatever I please. Not just guitars. And as I explained, there are thousands of uses of teleportation.
And this is how I invisioned it. I put on my disguise, teleport to a country like Germany, Spain, France, the US, Great Britain, take stuff there, and come back home. This has multiple benefits, one of them being that I'd never get caught (who'd search for me in a third-world country like Serbia?) and that, since those countries are pretty advanced, I'd get high-quality stuff as well.
But thievery is just one of the many uses of teleportation.
@Zeo: While super intelligence =/= omniscience, super intelligence =/= omnipotence as well. While you can figure out anything in your mind, it's sometimes impossible to make everything your superior mind invisions a reality. Apart from your mind, you're still an ordinary human with no extraordinary abilities. Take for example, that teleporting device you mentioned. Okay, you figured out how to make it, but simply don't have the means to do so, don't have all the parts, for example. You can't 'create' parts with your mind or anything, so you can't really say there'd be no limit to what you could accomplish.