I'm not sure how practical this is, but I wouldn't compare it to the yellow badge. The yellow badge was meant to single out members of the community for no reason but bigotry. Virtually no one has to be traveling right now--choosing to do so during a pandemic means agreeing to these sorts of quarantines, which need to be enforced in some way. I don't see anything particularly sinister about highlighting people who are supposed to be quarantining themselves for everyone's safety, especially when they probably shouldn't be traveling right now (maybe there's a 1 person in a thousand who has a really good, necessary reason to be traveling to Hawai'i right now).