Aside Pacasmayo, I'll be glad to share your experience.
The problem is that it is like playing different games on the same playing field, we don't follow the same rules when we practice football, soccer or rugby, don't we ?.
Ideally (I'm far from being in Hawaii), I would practice surfing (no wind or light offshore is the best), then kitesurfing (onshore, less then 25 kn) and funboarding (over 25 kn). Lately less funboarding, there is too much equipment to carry.
Surf : the first standing-up or the one paddling closer to the peak earns priority (get complicated with boogie boarders who almost never stands up, and the SUPers already standing up) and when you paddle back to the line-up you must get out of the way of the one surfing
Kitesurf : it seems to be the same rules in waves as surfing.
Funboard : the closer to the peak has priority, but the jumpers because they have less maneuvering capacities have priority over the wave's rider.
Add flat water sailing rules, ignorance, crowd, etc... mix all that ! It can be hell and dangerous.
What I follow : surfer has priority anyway (surfing or paddling), but I would not drop in a wave with any sailing device full speed on it. (Fortunately most of the time when the wind picks up, the surf is poor, so I switch to kite.) Sailing devices while riding : the closer to the peak gets the priority.
Things get tricky when a kitesurf rides and a funboard jumps, I don't know, the places where I go never get that crowded. I believe common sense and good manners should rule, safety first.
What do you do ?
Petite plaisanterie perso pour Kenny (Vive les quenelles)
If you don't surf don't start. (If you surf never stop.)