I'd not bother notifying anyone. If you live opposite a harbour, you'll close your curtains before doing anything you want kept private; lots of sailors, lots of binos and telescopes, a perfect excuse for people to be using them and looking towards the shore? You get my drift
On a related note: my Mum used to watch my brother's ship all the time (big cruise ship with webcams all over the shop). She actually managed to exceed her broadband download limit by leaving the webcam window open all the time and treating the PC as a "window" into my brother's ship.