It's not a direct threat but it is a passive one, it's also swearing and a contentious statement in a confined space where everyone needs to get along for the next N hours. They know damn well what the issue is but they're going to put their hands up and claim they're just expressing an opinion and they're not hurting anyone. It's childish behavior imo.
Except that this exact thing is the exact thing being censored everywhere around US.
Second, you know full well such name is not a threat, neither passive no active. The reason for that being not allowed is not a threat or abundance of other options. It has nothing to do with any of that. It is just a continuation of the above strategy.