This is something that bothers me, so I'm going to post it against my better judgment.
If someone comes to our corner of the world and asks a question, I assume they are asking because they don't understand. From that point of view, if a question or phrase or term is used incorrectly or in a way that seems derogatory, I also assume that stems from a lack of understanding. The operative words here are "lack of understanding." The person asking the questions does not understand and is asking questions because they want to understand. It's all about the want to understand.
So perhaps as we go along, if we read a post that bothers us in some way, we should take a step back and make sure that we are treating the poster as fairly, assuming that they did not mean to offend us and assuming that they came by because they want to know us and our views better. If a post rubs me the wrong way, I don't respond (that's not to say that every post I don't respond to offends me); I take a step back and let others respond first to see their take on it. I generally find that reading other people's responses often clears up any misunderstanding I might have had when I read the original post. Some people just don't communicate well in writing, others maybe just couldn't think of a better way to say something. Sometimes, things sound way better in our heads than they do being read by someone else.
I feel like we usually pride ourselves on being accepting and easy going around here, so we should do our best to live up to that even if someone says something that can be construed as insensitive. When one person gets offended, the next poster often gets offended, and so on and so on until it's completely unmanageable and has to be shut down. In my experience, it's rarely anything that should have gone that far.
I'm not saying that no one has a right to get angry, I'm just saying that most people are not out to offend (the ones who do usually out themselves pretty quickly anyway). Let's just try to give people the benefit of the doubt and not waste energy with anger.