Ok, something like mario kart DD with the sliding sparks there is nothing cheating about that, infact, it's not even cheap. why.....because it's ment to be in the game and it's ment to be used.
Your snaking method you speak of I probley wouldn't go as far to say cheating, it's kinda walking the line depending on how much of an advantage it weilds, but a cheap move to be sure. Since seeing it you could probley understand how it is being done, thats what kinda makes it not cheating. Plus it doesn't take that much effort to do, we are talking about a move you normally in the game, just doing it over and over and over to weild yourself an advantage.....hmm, da ja vue.
I think if you were playing someone who didn't use that snaking method but the only way you could beat them was to use it. I wouldn't say that makes you a better player. So if you play people who don't use it and you always use it, I don't see how you would asertain your skill. The only way would be if you both use it. Again, if you both have to do it....whats the point, why not play it the way it was ment to be played in the first place?
My examples of cheapness, that I consider cheating mostly involve halo2, since that has been the game I have played online with others the most. One thing cheaters used to do is what was called "the dummy glitch". It allowed a player to get into a warthog jeep, and with some button presses and constant button pressing, that player could be driven to the enemy base however could not be seen or damaged while they were at the other base, infact, could stay there as long as they want without being discovered. In a shoot-em up match this didn't really matter, however, in a capture the flag, it allowed that player to grap the enemy flag, then transport all the way back to his base and score within just a few short seconds of the flag being taken. Many people used the excuse to themselves of saying, "it's in the game, so it's not cheating"....but come on, if you have that mindset....what goes on in your head. How can you bullsh*t yourself into believing your not a cheater when you clearly are. Bungie aknowledged on their website that this was indeed cheating and players shouldn't do it, and in turn, that particular glitch was patched by bungie and can't be exploited anymore, but their are still other glitches that allow you to jump extreamly high that allow you to get up on top of places that you normally can't get to, and would give you an advantage.....hence the term, and unfair advantage.
Again, just cause it's in the game....doesn't mean that it's not cheating....more than likely it means it was a glitch overlooked by developers.