[Dev question] Do you know about the player devision in palace of the dead?

[Berethos]

yeah, and random partys exists for a reason too.

We also have a report function that exists for a reason - it also happens to be the answer to the OP's issue. The devs are aware that toxicity like the above can and does happen, and it's why it's a function in the game and why they have staff to look at said reports.

Report it, black list the individual, and move on.

Unless the OP wants a GM on hand to smack players in the back of their virtual heads when stuff like that happens, they already have a solution to their problem.