So... you asked for information, people gave you information on where you could best capture the movements you want to see without law-enforcement difficulties, and you characterize it as an attack, and say you'd rather do it on your own next time?
I'll admit that I'm confused, we should all be so lucky as to get detailed responses when we post requests such as these...
I'm sorry if the tone isn't quite what you would have liked, but anymore people often feel the need to protect what few spotting locations we do have left. At least 2 of the people who have responded to you are Dulles regulars who would stand a lot to lose if something were to be spoiled with the Airport Authorities. We assumed that you, like most members on this site, would be interested in getting the most well lit, high quality imagery possible while there, a logical conclusion. While Udvar Hazy would not be the best place for that, personally I would be more than happy to direct to a place that would be ideal, and is not in the guide that was posted. You want to catch the ET 787, and frankly I would like nothing more than to help you make that happen.
If you are truly interested in figuring it out, feel free to contact me.
Good luck out there!
[Edited 2012-11-18 16:29:57]