Not sure what that has to do with "Do windsurfer invade kite forums"
but seeing you asked.

As a surfer, a kite or looking through a little foggy plastic sail window, is in no way "adding to surfing".
Surfing is surfing,
the other two are just for those too lazy to paddle for waves and both arent really "surfing".
but are fun

Most surfers think that both kiters and polers are pretty lame in the waves.
But dont let them know how enjoyable it is



Shhhhhhh
Just my 2 cents. but probly only worth 1 cent