Norm, I don't think Hosty has much to worry about at this point. In certain cases where the population is out of control, I've seen the fish and game people addle the eggs on a nest site. The idea is to shake them vigourisly but not damage the shell.Replace them on the nest and the parents will still tend to them even though they won't hatch. They will not re-lay a new batch and will eventually abandon the site and subsequently not reproduce that year. I do not suggest this unless it is causing major damage, and legal issues are verified.