In all honesty we shouldn't be so harsh with those who have given Argenta those advises.
Nonsense, they're obviously losers who deserve ostracism. This has been stated clearly, and is an implicitly active DM policy;
These kinds of players are absolutely no fun to interact with, or DM for. We ignore them. We don't grant them favors.
I've denied applications, stopped running plots, and entirely avoided the people who send me these Tells. Its a very good way to get yourself black listed by the DMs for just being a jerk with a bad attitude.
The question isn't how we should approach these players, they're clearly unwelcome. So, as said before, the question is just what to do with those people.