I want my favorite band to play a show close to me as much as the next person but you don't see me bombarding the band's Facebook page or Twitter asking them to "come to brazil" or "come to my shitty, obscure town". Weird Al said it best:
First of all, this bears repeating – I basically have NO CONTROL over where I play. There’s no reason to thank me if I’m playing your city, and there’s REALLY no reason to get mad at me if I’m not. I don’t decide what city I play, or what venue I play, or what day I play. The way it works is, I tell my booking agency how long I’d like to tour, and then they put a tour together based on whatever offers come in from concert promoters. So if you want to twist somebody’s arm, maybe try your local concert promoter… but you don’t need to convince ME – believe me, I would love to play EVERYWHERE!