Rappers using profane language is not the same as someone getting up in your face and taunting you with abusive language in an attempt to incite a response. There’s a reason free speech protections in a lot of countries exclude what are called ‘fighting words’ and a person may be arrested (for attempts to incite violence) or required to leave a public space (for violation of common decency standards) in response to such behavior.
Regardless of real work implications, however, CCP has stated the EULA applies to the test server, but has failed to provide a private method for reporting such violations (since support tickets cannot be filed for Sisi) - leaving players only with the option to publicly report this behavior in the hopes that CCP will do something about the offensive behaviors of players who take Sisi’s lax policing as license to harass others in ways CCP has explicitly stated are unacceptable.
If CCP is not going to enforce the EULA/TOS on Sisi, they should not make Sisi accessible outside of the times where they have staff available to monitor the server for issues. Otherwise, they are creating a permissive environment for abuses.