I try not to explain Kane; simply put, his continued existence makes absolutely no sense to me.
...
No, I should revise that, and I'll tell you how I thought, and then how I suppose I'll have to explain Kane if I become a freelancer.
Previously, I figured that if Kane actually was "#X on (Everyone's) Most Wanted List ... And Dropping!!", someone would have dropped one or three hundred thousand on making sure he didn't pollute the world any more. As the saying goes, there's nobody who can't be assassinated; after the second or third country where he'd pissed everyone off -- and with that sort of heat coming down on him, imagine how much was coming down on his employers -- somebody or another would have taken a contract out on him, and he would have been killed, period. Kane wouldn't've lived long enough to challenge the Gingerbread Man. (Whom, I'll note, I really hope survived.)
Now? Now the only way I can explain Kane's existence is that he did a huge amount of media image engineering and hacking, probably hiring (or being an experimental front-man for) the people who've become Horizon. Think about it; according to what is and has been said, Kane is wanted by bloody well everybody. You know that if this was actually true, there'd be a price -- multiple prices -- on his head. The guy who puts a round through Kane's brain is going to collect hundreds of thousands of nuyen, even millions, because everyone on any Most Wanted list has got dollar and nuyen signs behind their name. Bounty hunters would be hammering the pavement behind him, looking to take him in (or just down); freelancers would be shooting at him every hour of every day.
There's no way to explain this except for the fact that it's all fake. "UCAS FBI's #3 Most Wanted ... And Dropping!!" Until he hits #1, and stays there for a week or so until they correct the plant and re-tag him with a much lower 'this hoser screwed with our system, keep an eye out and kick him in the balls if you find him' tag. Remember, he's done this everywhere. There is no way he'd've survived unless it was all hacking and social engineering to boost his Public Awareness through the roof. Sure, he's got a reason for it (to save the chica Aztlan had captured), but think about it -- he's gotten a racing team out of the deal. There is no way in hell his reputation is actually earned; it's manufactured.
I'm sure he's screwed over a few people along the way, though. In fact, I'm sure he's screwed over every 'runner team he's ever been with ...