I see the phrase "punishment fit the crime" being tossed around, and even though it's just a cliche, it rubs me the wrong way just a little. I grew up on The Twilight Zone, so I love an ironically appropriate punishment or twist of fate as much--nay! more--than the next man. People who are ugly inside forced to look ugly outside? Love it. Woman who kills her mean guardian forced to take care of his last invention--a replica of him that will never die? Super.
So, sure, if you look at this story, it might seem like the punishment (being locked in the toyshop) doesn't fit the crime (seeing women as objects of his pleasure, toys). What's the relationship between a womanizer and a giant cat that hunts me? Well, high school me says the answer is a word starting with "p"--in the first case, it's something he hunts, in the second case, it's something that hunts him. And that's not the only connection between punishment and crime. Here's a guy who hates children forced to become object of merriment for children. Here's a guy who doesn't like children--whose sole goal in most of the story is to go watch other people play a game--forced to take part in a game/toy that's not of his own making.
Which is funny to me since that's often the situation for people who aren't playing on what Scalzi rightly calls the lowest difficulty setting.
So, yeah, I think the punishment does fit the crime in the horror story sense of being an ironic inversion.
I also think, and this could just be me, that the word "crime" in that cliche is throwing people off. I mean, some of the responses here seem to me to be (to paraphrase), "hey, it's not illegal to want to sleep with women." (What an interesting speculative premise that would make, eh?) But horror stories are often extra-legal in their scope of punishment: someone gets away with something and is not punished by society, but is punished by the forces of good-and-evil.
Which makes this story doubly interesting to me because (it's been argued that) horror can seem awfully regressive: teens running off to have sex get the knife; people who buy more house than they need (oh, the devil of easy loans) get the ghost; etc. In other words, like certain strands of comedy, horror often ends with a defense of the status quo: "that deep dark well that no one gets their water from--you should listen to tradition and not get your water from there." And yet the guy getting punished here is representative of a certain status quo.