[zozbot234]

That's how you would design a filter class, if you were trying to actually treat students fairly. The point is that de-facto "filter" or "weeder" classes can arise wholly organically (as in, 100% organic banana peels!) as the hopefully-unintended consequence of abysmal-quality teaching. And OP seems to be talking about something very much like the latter, not the former.

[vanusa]

Yeah, I guess I'm kind of nostalgic for the days when being a college instructor was still considered a viable profession in itself.