Several readers complained about a story in our March issue about the new Sky Train from Beijing, China, to Lhasa, Tibet. They say we shouldn't have written about it, because the train can be seen as one more way China is subjugating Tibet. The truth is, we thought about noting somewhere the ethical issues with Tibet, but we didn't because we thought that it's the traveler's decision whether or not to go there--and if we include the ethical considerations every time we mention a place with a dicey human-rights record (China, Egypt, Jamaica, even the U.S.), there wouldn't be a lot of room for much actual travel info. But as the situation in Tibet heats up, I wonder if we were wrong. Any opinions out there?