Well anecdotally when I see people not getting it right, they are generally the older fans in the fat cat seats.I'm an old fart, and - before digital tickets - used to buy football tickets out on Monroe or Breese Terrace. One game was going to be a 'stripe out'; red or white depending on the section. So, what to do? I wore two shirts, red and white, so I could have the correct one on the outside, once I knew what section I'd be in.
I had white on last weekend. They did a poor job of publicizing it. You want people to wear white on Sunday? Don't give away the white t-shirts on Saturday, do it ON SUNDAY!
Age has nothing to do with it.
YMMV