As I explained in-game, we don't really want to exclude people from accessing TeamSpeak, adding more restrictions is more likely to stop people who actually want to join and talk nicely rather than those who are these specifically to abuse the rules.
If you're ever in a situation where you can't get hold of staff please report them, if you use the complaint feature built into TeamSpeak then we can act when a member of staff is next online. I'd also suggest moving into a private user created channel in this situation too, if they can't get any reactions from people then they're more likely to leave.