Question

Lately, in my area, they’ve been making a big fuss about coming to a substantial, serious, well-prepared Daf Yomi class.
For years there have already been several groups learning it, and I know them, but now they’re trying to make something bigger.
My hesitation, and probably that of other neighbors too, is that we know these groups, and gently, with all due respect, we know that the people who take part in these classes do not stand out for better behavior. They really are not a symbol of honesty, consideration, humanity, or even any kind of life wisdom or moderation or anything like that in the area; they’re not educators either, just ordinary people.
And I won’t go on, except to say that some of them are coarse, extreme on various issues, really ignorant, don’t volunteer for worthwhile activities, and are not an example of anything we could point to as a model for ourselves, and certainly not for our daughters and sons.
Is there really anything we would gain or be strengthened by if we joined them in these classes?
You are a rabbi and surely see things differently, so we would be glad to hear.
(There is also, at the edge of this, a concern about loss: that if decent, gentle, modest, volunteering, honorable, and educated people take part in their classes, then through some process they may become more like the behavior of the class participants—and perhaps especially that our daughters and sons will become like that.)