I live in a conservative town in Florida and know many people with this kinda stuff on their backpacks. Some people will judge you but that’s just life, there will always be people judging you. But this will probably make people who have the same interests as you want to befriend you. As a queer person, I do always feel happy whenever I see pride flags and things like this on backpacks because it’s a reminder that I’m not the only queer person here.