Hmmm... Lots of good and interesting points, but lots of bickering, too. Hope everyone can chill after this.
About mediation - IM O, it can be a good alternative to court. But when parents refuse to go, I think it's often b/c they have nothing to gain but, perhaps, something to lose. Basically, as has been said before, the parents have the authority over who their child spends time with. If, say, they don't want their kids to spend time w/ the GPs and the GPs want to see them once a month, yes, they can compromise at every other month. However, that means the parents will have forfeited some of their authority (that's what I meant by "something to lose"), while the GPs will have an authority they didn't have before - a say in what the GC do w/ their time. IOWs, the GPs will have gained something, while the parents have lost something. It may seem that both the gain and the loss are very small here. But I imagine some parents still resent the idea. In fact, they may feel they stand more of a chance to win in court than to get anything out of mediation. IDK for sure, just ruminating...