It's important not to get too freaked out about this:
read the actual proposal before getting all wound up.
I've had a scan of the actual plan document

(
http://www.stirling.wa.gov.au/Home/Development/Projects/Scarborough+Beach+Urban+Design+Master+Plan.htm ), and people might be making a fuss about not much.
1)
There's nothing I can find in the plan about banning sailing or kiting at any location. What it does say is to build a purpose built rig up area at point 24. Taking the document at face value, the worst that may happen is that the relocation of the bottom car park we currently use would make the current spot harder to walk to; you might have to rig up at point 12/13. OK, they may try to get folk to use the "designated" facility, but right now that's not the same as closing the current spot. The biggest ball ache might be during construction; access will be a nightmare for everyone.
So the most important thing is not to get hysterical and start screaming about sailing bans. If we are to influence the CoS, it must be measured and professional. Descending en masse on a meeting and protesting about stuff that's not actually on the cards will just get us ignored. Letting WWA and WAKSA lead is a good plan, as long as they keep cool too.
2)Let's face it: this is Perth, and even if a ban was put in place, it's far to slack for anyone to seriously enforce restrictions properly. There's been a semi ban on kiting at Dutchys for a couple of years, and I've never seen anyone pulled up. Ditto Lancelin foreshore - except if Werner starts yelling. Even surfing on Cott beach in the summer is tolerated if you're not stupid around swimmers.
3)It's a consultation proposal, not a firm plan, so not approved or underway in any form. Councils come up with these all the time (like the wild plans which appear in the West Australian from time to time for the city foreshore or the Perth Link), but they almost never get made as they're impractical and stupidly costly. It's more an exercise in grandstanding and wasting money on consultants (and if anyone goes to the meeting, ask why it's all Chinese and Thai consulting firms doing this - but would explain the lack of understanding of surf activities). So I'd bet only a fraction of this ever gets done. Generally, next election, the new CoS councillors will scream at the cost, and bin the last council's plans and come up with something even more daft

.
4)Even if CoS gets the cash (hello Financial Crisis), and the agreements to actually try this, it's massive. So would be years and years before anything would change. It'll be more of a worry for our kids than us.
5)Is there really much difference between the proposed spot and the current one? Waves are the same, wind is the same, and we're away from the clubbies and swimmers. The concerns about theft and safety are rubbish - no worse or better than it is now because it's only sailors there in the evenings at the current spot, and the whole plan is to increase people there, and spread out the people across the beach. There's a whole bunch of "don't wanna change/don't wanna be told what to do" on the forums. With a properly located, properly sized (the current one isn't exactly huge!) and posh rig up area, this could end up better than we have now, so we need to keep an open mind and not reject just for the hell of it.
That said, it's certainly worth getting to the meeting and having a talk with the council, get the details and get our voice heard. If you can't get there, use the online submission form:
survey.stirling.wa.gov.au/checkbox/Survey.aspx?s=12e8ad0911154b839e71206378e8bfc2&ForceNew=true to have your say. But let's keep it calm and collected, or we will be ignored.