Regarding catching waves, I took my kite foil out for a bit of a play in the surf without the kite. You can let the white water engulf you and you get enough of a push to end up riding out the front. As long as you're moving then you can pop up on the foil and have some fun.
Not sure about surf foiling but a tight radius kite foil carve feels a bit more like throwing a mountain bike around a berm. There's a big dip as you weight up the wing, like loading suspension, and a massive swoop on the exit.
Getting air is huge fun. It sounds like a light sabre as the hiss of the foil gets louder then goes swoosh as you carve and pop.
I suspect crowded lineups won't be a concern. Most foiling will happen on days shortboarders would not even go to the beach.
I guess there will always be dickheads and kooks. There's certainly enough of those on Seabreeze.