There is a difference though between this lockpicking style and the one you describe. Instead of having to seek out lockpicking books and/or tutorials (actively pursuing something malignant), people who find out about the nefarious use of KeyMe probably already use it for their own keys, too. I might be able to find out how to surpass most routers by Googling half an hour - that doesn't mean that I will do so. But if I figure out how to surpass my own router, I might be inclined to use this trick simply because I've done it before. That, and it's a reminder of how perceived safety can be misleading.
We're still talking about turning "random creeper you'd give your keys to but not for long enough to dupe" into "random creeper who has your keys." Intentionally duplicating someone's keys against their will is still malignant, whether they do it with an iPhone or an Altoids tin full of playdoh and a couple tubes of JB Weld (works and well). It's the "lead me not into temptation" argument: that somehow, if it's that much easier to do something you'll do it and that the barrier to entry is the difficulty of the task. If that's the case (and I don't think it is), then the only real change this makes is it empowers the crime-ignorant but phone-savvy creepers.