I think there are also a lot of people who don't realize how their words hurt others and, worse, don't believe their words can hurt others. (I have a female friend who works for the City of Olympia. While I don't know if she's ever used a manhole, I certainly have no reason to assume no woman ever has!) I think we can take limiting our word choices too far, but I think being a little more careful of them is better than blindly using words without thought of their consequences.
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Gillian
"Now everyone was giving her that kind of look UFOlogists get when they suddenly say, 'Hey, if you shade your eyes you can see it is just a flock of geese after all.'"
"You can't erase icing."
"I can't believe it doesn't work! I found it on the internet, man!"