I voted 'Never'.
I don't need to trust my players because the game is being run entirely from my perspective. If I see there are issues with the game, I'll solve them. If it means letting players go because they are disruptive, then I'll do so.
But I couldn't care less how or why that disruption came about. If a player is a schmuck and I let them go... whether I "trusted" them or didn't "trust them" is irrelevant. I could have an entire table of people I "trust"... but that in no way assures me one of them won't be a schmuck and that I won't have to let them go.
Now if someone wants to say I'm more likely to have LESS schmucks at the table if the players that I bring in are trustworthy... I won't disagree. But just like being a trustworthy person doesn't mean you can't be a schmuck... being an untrustworthy person doesn't mean you automatically will be. And thus I do not go out of my way to check or test everyone's "trustworthiness" prior to letting them sit at my table.
I don't need to trust my players because the game is being run entirely from my perspective. If I see there are issues with the game, I'll solve them. If it means letting players go because they are disruptive, then I'll do so.
But I couldn't care less how or why that disruption came about. If a player is a schmuck and I let them go... whether I "trusted" them or didn't "trust them" is irrelevant. I could have an entire table of people I "trust"... but that in no way assures me one of them won't be a schmuck and that I won't have to let them go.
Now if someone wants to say I'm more likely to have LESS schmucks at the table if the players that I bring in are trustworthy... I won't disagree. But just like being a trustworthy person doesn't mean you can't be a schmuck... being an untrustworthy person doesn't mean you automatically will be. And thus I do not go out of my way to check or test everyone's "trustworthiness" prior to letting them sit at my table.