I hate to drag this out again, but the NCAA threatened to disqualify Turner Washington after he rips off his top upon winning the Discus. They don't, but he has to put his shirt back on. Then the NCAA Track social media accounts CELEBRATE him and show him ripping off his shirt...
Also Grayson Murphy stops to grab a US flag to carry across the finish line at the World Mountain Running Championships and *checks notes* IS CELEBRATED (Not unsportsmanlike)
The rule is a joke.