Perhaps we are just "holdin' on for dear life" out there...
Actually I see a lot of waving, nodding of the head, a smile directed our way, and try to either be the first or at least reciprocate.
Once underway, in the narrow confines of Alton Bay for instance, it can be tough to wave when someone is looking your way, but I agree with both of you, there just isn't enough. Perhaps if there was more friendliness, there would be more courtesy and less complaints about boating on the lakes.
I guess it all starts with each one of us.

(Closest I can come to a wave without using the banana or clinking the beer steins together.)
Hope to see you and wave to you in the near future.