If a man does not want to sit next to a woman, he should move away. Why is the onus on the women to move??
Right. And if almost everyone who uses the bus line wants to sit seperately, then the easiest way to facilitate that is to simply make one end for men and the other end for women.
And then if either a man or a woman accidentally sits on the wrong end, then you politely tell them of the system. And if they are normal and respect you, they will move instead of the entire rest of the bus having to sit not the way they want.
And if a man or a woman deliberately sits on the wrong end because she has an agenda against the way that almost everyone who rides the bus thinks is the proper way to practice their religion–then yes, I would call them shkotzim and force them to move.