You have been dismissed from both the party and the duty.

[EaMett]

There's also outside of games channels like discord or psn party which the GM wouldn't really be able to check either. A report will basically do nothing

A single report might not but repeat offenses will. There's no harm in flagging an account with a report if they do something wrong. I've had people join fourth floor savage parties only to get the unlock and jump ship leaving the other 7 people to queue in PF again. Reporting them wouldn't lead to much since those players could always claim something "came up" but after a few reports that no longer holds up as an excuse. If anything you should report in these scenarios.

[Mavrias]

A single report might not but repeat offenses will. There's no harm in flagging an account with a report if they do something wrong. I've had people join fourth floor savage parties only to get the unlock and jump ship leaving the other 7 people to queue in PF again. Reporting them wouldn't lead to much since those players could always claim something "came up" but after a few reports that no longer holds up as an excuse. If anything you should report in these scenarios.

Hate to break it to you, chief, but no ones getting punished for leaving groups of their own volition. You cant control other players leaving groups, whether it annoys you or not.