Sarajevo Safari is the name for an alleged war tourism phenomenon during the siege of Sarajevo (1992–1996) involving human hunting. According to the reports, wealthy foreign nationals were enabled, for large monetary fees, to shoot at civilians in the besieged city with sniper rifles for entertainment purposes.
That’s ok, I was confused by your reply too, and I was trying to guess at what you meant. Your last sentence seemed to imply that evil people naturally rise to power and were only given rings because they were already evil and were therefore Sauron’s natural allies. Where I was headed with my reply was that it doesn’t really matter if the ringwraiths were good or evil before they received the rings, because the purpose of the ring was to convert all that they were, political power, personal identity, and all, to the service of Sauron’s will.
On the subject of mind control: The Nazgul purportedly can’t resist the will of Sauron (at least not by the time of the events of LotR), but many characters (Bilbo, Gandalf, Galadriel, Faramir, Sam) willingly refuse to take the ring even for a moment, and some can even willingly give it up after they’ve possessed it. I’d call what the rings do “influence” or “temptation” before I called it mind control. The Nazgul cannot resist Sauron because they can no longer imagine themselves not in thrall to him. Sauron doesn’t mind control them in the classic sense; he doesn’t have to.