BYU fans will get into it. I'm willing to bet there won't be anywhere near the volume of big12 stickers on cars that there were pac12 stickers. For one a lot of BYU fans made it known how ridiculous ute fans were for doing it and won't want to be hypocrites. But another is that far less BYU fans care about Utah fans than Utah fans care about BYU fans so they just won't even consider it, they just won't care to try to rub anything in.