A few quick points:
1. WWJD said a lot of very wise and biblical things in her first post in the thread.
2. WWJD made one weird sounding statement, about clothing, which she really should have just written more carefully.
(The way she wrote that statement, probably in a hurry, wasn't precisely what she meant.)
3. The statement above, by Ladybug, pretty much gets to the heart of it, and says it nicely.
4. Let's round this out by taking a quick look at historical context.
When the bible says not to wear clothes of the opposite gender, we need historical context.
A. First, this referred to some specific ways of dressing, which would be clearly identified as "opposite gender" in that culture.
B. Next, people would have understood THE BROADER CONTEXT of dressing, intentionally, as "opposite gender"
-- There WERE cross-dressing, gay, transexuals in that time period.
-- Once again... there WERE cross-dressng, gay, transexuals in that time period
-- This was well known in the pagan nations
-- This was often part of pagan religious ceremonies, and temple worship
-- There were plenty of people, in pagan cultures, with what WE could called "gender identity issues".
-- ALL OF THIS WAS WELL KNOWN TO THE ANCIENT ISRAELITES
-- THIS WAS EVEN ADDRESSED IN OTHER SCRIPTURES, IN VARIOUS WAYS
From historical context, we can easily see God was just telling people to STAY AWAY from homosexuality, and all of the "gender identity" weirdness, and just KEEP IT OUT OF ISRAEL.
It had nothing to do with anything harmless or innocuous, like a girl wearing her boyfriend's shirt.
It was, historically, dealing with homosexuality and "gender identity" issues.