Don't start thinking you're safe because you're from Chile and you think Niantic doesn't care as much as they do with US, etc players
I live in a neighbor country and I've been perma-banned (2016-08-13 19:53) on an account I didn't really care that much about to be honest XD (will miss that 100% IVs Dragonite though)
I used PTC, used my real coordinates as well. And I think I didn't change the walking speed (that could be a reason, but I highly doubt it)
But, as some say, I went YOLO on that account, so I didn't really mind if that one got banned e___e.