Some time ago, I read a story in the Seaside newspaper about a young boy, preschool age, I believe, who sunk down into a large hole on the beach. As far as I can remember, and I may not be getting this exactly right, the hole was covered with sand but not completely filled. When the youngster sunk down in it, he was immediately covered and, by God's good grace, the parents somehow found him. (I wish I knew which day and week I saw this article, but it's been awhile ago.)
Anyway, I say all that to point out that not only turtles are endangered by these large holes left on the beaches...this child almost died!