Fictional Worlds I'd Rather Not Visit

This topic from Long and Short Reviews’ blog hop was an interesting one. I’ve read a lot of dystopian fiction and have, on occasion, found myself staring at the book thinking “You know, this doesn’t actually sound that bad.”
Take the “Uglies” series, for instance. The concept there is that teenagers are classified as Uglies until a certain age (16 or 17, I can’t remember which) when they are given extensive surgery to make them manga-inspired Pretties, at which point they move to New Pretty Town and spend the next couple of decades partying with their pretty friends. Sounds fine to me. The characters want to remain Ugly on principle, especially when they discover that Pretties also have brain surgery to make them more docile, but even with that I found myself thinking I’d be quite happy to go ahead.
However, if you take something like “The Hunger Games”, that’s a world I’d like to stay away from. A corrupt government who pits children against each other for entertainment and makes half the population live in poverty? Definitely one to avoid.
And the other one that I would hate to visit? “Matched”. This is a series about a controlled society where the powers that be choose your partner for you and everything is limited – they only have one hundred songs, one hundred stories, one hundred poems and so forth. The matching of a partner is one thing – it seems to work out OK for a lot of the characters. But only having one hundred stories? I could work through those in the space of a year.
So which fictional worlds would you avoid?