The way I see it Kiters are probably the ninjas, and windsurfers maybe the pirates, both cool in their own way.
Could they be friends?
Well, maybe, as long as all the decapitating and drowning and other stuff was sorted.
Any lessons to be learned?
Maybe to stay away from zombies and robots.
( I would love to be able to do the whole "when Harry met Sally" dialogue but I think that's Waveslaves thing)