This reminds me of a story one of my former professors told me. My professor was a school librarian for a long time, and one of the students in the school actually cut down a tree from her house to bring into the school library.

Well, the principal told her that they couldn't have a Christmas tree...some people might get upset. So, instead she decorated it differently and made it a "winter tree." How could she really get rid of it when a kid had cut it down and brought it in for her?

The Seattle airport should just put up a sign that says "Happy Holidays tree" or something. Of course, then some people would get upset because it doesn't say anything about Christmas (there are actually people boycotting stores that use the slogan "happy holidays")....it's all a bit ridiculous.