Why is this so funny to me?

2gypsies wrote:
As volunteers in parks this is a very common sight. The campground is for camping, not to take up space having lunch and relaxing all afternoon. The sign isn't funny at all. :)

Exactly! ;)

I have witnessed potential campers driving through a camping area only to find people using sites just for relaxing and having lunch or to fish. The legitimate campers, probably thinking the inconsiderate people doing this were tent campers that haven't quite set up yet, drove on.