Here is the thread from previous trip 9-2008, I was also there in 11-2007:
http://www.fksa.org/showthread.php?t=6939&page=2
I emailed Rick at that time, the details and some pictures of the worst offenders, you recognized them. Just people riding amonst the swimmers, a few getting sprayed and yelling at the riders. Though at one point someone crashed with their kite just upwind of some swimming children. It didn't look like he going to relaunch his kite in time so I started running to grab his kite (it was in the break at this point), but he managed to get it up in the air before it was too late. It has actually slightly north of fort lauderdale, lauderdale by the sea.
Almost one year later, in 8-2009 there was a thread about a ban in lauderdale by the sea
http://www.fksa.org/showthread.php?t=8210&page=4
I emailed the mayor about it (don't worry, it was well written) with concerns of future visits by myself, since I choose her city based on kiteboarding destination. She called me to discuss the issue and seemed to appreciate the tourism aspect of it. I told her I would never visit her city again if they enacted any ban or registration, I would just go to Puerto Rico or some other kite friendly place. I suggested enforcement only against the people causing problems using existing rules (like endangerment), which she said she would look into. I used an example of a reckless surfer that rode into swimmers, treat it the same. I was pretty happy with the conversation at the end...but not sure what ended up happening there...