The scum line has been a popular place to fish since at least the early/mid 70's. Every Charter Captain of that era knew what it was and when to fish it. It was commonly referred to by that name on VHF radio. I speak from firsthand experience.
Re: Our fall SH run, it's not as bad as some of you think. Keep in mind that the last 3-4 years have had some incredible fall runs - both in fish size and numbers. Everyone agrees we need water.