MB4 233b: Can One’s Wife Participate in an Eruv Chatzeros (367:1 - part 2)

If one of the residents is away can the children participate in the eruv chatzeros with the other residents of chatzer? What if doing so is against the father's wishes?

If a resident says he doesn't believe in the concept of eruv chatzeros.

Can bet din force a resident to participate in an eruv chatzeros?