I disagree. Surely a resident should be allowed peaceful enjoyment of their property, and if that means prosaically fishing from your riverbank all power to you. I think you’d need to see the pool layout and ensure he’s not interfering with primary pool users or making or leaving any mess but other than that it’s a common and perfectly legal activity. And I don’t think kids are that fragile to be overly distressed by the goings on here as they would be at any public jetty and often times it would be kids fishing anyways. If you live on a river and access to it is available, I think you’d find any adjudication would over-rule any attempt to limit it.