There's no cheating on a Single player game where there isn't even highscores. It's up to you to decide if it unbalances the game. Of course a legit world is one you don't use any mods, editors or abuses glitches.
i wouldn't say its cheating.
its just making your game play more convenient really.
i mean, either place A flag on the ground to mark the spot, or you can hog up few buckets of lava and make a huge lava pool,
so the map will show a tiny red dot.
I actually haven't felt the need to use them, I think for me, it would destroy a bit of the fun of exploring, and trying to find tall "parkour" style mountains to climb and see the view. I can see why people would use them though, as sometimes I am stuck in the middle of a dense tall tree forest (I must admit I don't like those forests, its annoying trying to get every last log of wood from a tree there) and I can't figure out which way to go.
I wouldn't technically consider it "cheating" as Minecraft is a game you play on your own terms. I usually conjure up a diamond toolkit. I pretend I'm working for someone else, and of course, your boss always provide you with the tools to do the job properly :wink.gif: But on my current world (in single player) I am doing everything legit, all I have is an Iron pick right now, everything else is cobblestone (since I have an overabundance of it LOL). I also have full iron armour rofl (I was going to make a full iron toolset, but backtracked when I found a massive cavern filled to the brim with every mob possible LOL).
So it really depends on your style of gaming and what your trying to get out of the game :smile.gif: