Holy run on sentence Batman, let me stop you right there. Kojima did not "ceaselessly beg Sakurai like a poor man," or were you there to witness said "begging?" Sakurai and Kojima are good friends, and Kojima requested Sakurai to add Snake because his son asked him why his own character wasn't in the game. Once again I must state, the licensing and trouble one must go through to acquire a third party character is no small feat, if Sakurai went through the trouble of adding Snake for his friend, then they must be damn good friends, and I don't think he would go against his word and remove Snake after adding him.
Like you say, you were playing the game when you were six, just about every twelve-year-old with a console is playing bloody, M-rated shooters that they sure as hell shouldn't be playing. You think Snake appearing in Smash, in a non-violent manner mind you, is going to harm these children? You're backed up by two "highly experienced" talk show gamers? You lost even more credibility in my book, because those kinds of people tend to be biased as hell and don't know a damn thing they're talking about. You know the biggest thing that makes everything you're spouting a load of BS? Snake is too violent? He's from M rated games? He doesn't fit in Smash Bros.? Guess what, he was already in Brawl, despite the "violence," or his games' ratings. That didn't stop him before now did it?