XMc etc (yoicks, that's a hard username to remember :-) ) I hope you don't take offense, because I don't mean any, but part of the "problem" may be that you don't like kids. For the record, I "don't like kids" in general either, ie. I have little tolerance for the annoying sides of small kid behaviour, but having had one I understand them a whole lot better. They're not that different from dogs, actually

I won't draw the parallell too far, but kids running around are a part of society, just like dogs are, and you can't avoid kids completely anymore than dogphobics can expect to never meet dogs. And just like dogs enjoy a bit of freedom, kids do too. Also, kids grow up to be reasonable human beings, and you can have a positive impact on that. No matter the legal consequences (which I find mind-blowing, to be honest), if you can find a way to interact with these kids in a good way, so that they have a positive and safe AND responsible experience of meeting your dog, that's one less dog-phobic in the world. That's one heck of a (gorgeous!) huge dog you have there, and I'm not sure that a frazzled mom out with her kids in a park that has a dog area is completely expecting something the size of a horse galloping around. Most parents do care about disciplining and controlling their children, just not in a situation that they perceive as frightening, then all they care about is keeping them safe.

Just a few thoughts. I hope you work it out somehow.