The ruling leaves boating open in all navigable channels, therefore
certainly doesn't "outlaw boating in all navigable waters" in the US.

All the ruling does is clarify that the riparian land owners also own
and control the shallow waters outside the main navigable channels.
While this affects rivers, creeks, etc to some extent it will effect
lakes almost not at all and coastal areas won't even notice any
difference.

But you couldn't pass up an opportunity to take a shot at Clinton. Too
bad.