Quite frankly, this seems like nothing more than an example of why its a truly lousy idea to get your news from one source, especially one that is biased towards one side of the political spectrum.
However, since Avatar ended his original post with the caveat that he wanted to see the other side to this story and "if true" it was outrageous, I think it was pretty obvious that most here took it with a grain of salt.
From what I have read, I can completely understand why parents who believe that homosexuality is a sin would be upset by the school's decision. Having students speak openly about how they are gay and how that effects their lives in a school sponsored setting sends the very obvious message that homosexuality is ok and that the school is fine with it as a moral equivalent to heterosexuality. If you believe that being gay is a sin - having your child's school teaching your child the opposite is going to be an issue.
From the school's standpoint, I agree completely that you can not have an effective learning environment without all students feeling safe and secure. Students have to be taught to respect eachother and the differences that they will encounter in the world. Since homosexual students will be part of most educational settings, there is nothing wrong with a public school addressing it.
I think that the school can address these issues without promoting one particular lifestyle, however - since it sounds like the school did the right thing by allowing parents the ultimate say in whether or not their students are present for the information or not - this sounds to me like one more "non-story" story.
I am always a little shocked when I side with Bullypulpit on anything (just kidding, Bully), but it seems like the reported from WorldNet Daily was a bit more rabid than he needed to be. The school wanted to promote a safe, non-bullying environment, so it held a presentation to discuss that all students needed to be treated equally regardless of personal choices or differences. Parents had the right to remove their children from this presentation if it contained a message they did not approve of.
This sounds like the ideal situation to me - public schools not following any one religions messages and parents having the ultimate, final say of what their children are exposed to.