Well it is not something that is happening down under, no segregation here on the beaches at the moment.

I don't see a major issue with it and even though i have children, i can well understand the need of those who don't not wanting them around, so i say why not? sounds a reasonable idea to me.

However kay-ann made a good point, alot of the adults are obnoxious themselves, so you might not get the relaxing time you planned at the adult only beach after all.