Spirit Day is meant to help raise awareness about LGBTQI bullying in schools and otherwise, how it affects queer youth, and what we can do to stop it. As I found out in my teens, you don't even need to be gay to experience abuse.
I will always remember the summer I got a bad perm and had to nearly shave my head. It was almost a military brush cut, short back and sides with a bit to work with on top. After the initial shock wore off, I decided it was comfortable and actually looked pretty sweetl when I spiked the top bits. Why should the boys have all the fun? So I kept the short cut a bit longer than I previously intended.
When I returned to school to begin 8th grade the harassment started quickly. At first it was just 'baldy' and 'Uncle Fester', but eventually a classmate told me that a lot of the girls thought I was a lesbian. Some had even said that they didn't want to be alone with me in the locker room any more. Eventually the lesbian taunts came out in the open daily, on the school bus and in the halls. I willed my hair to grow back faster, faster! But even when the hair returned, it didn't matter what I told people, no one believed me, the damage was done. I would face those slurs (as well as the ever popular Uncle Fester) for years to come.
Maybe instead of continuing to harp at teens about bullying - a subject a lot of them have almost tuned out to at this point - the best thing may be to just ask kids as early as possible what they think and feel about LGBTQI relationships.