People don't seem to realise that yo ucant help it that there is no wind, i mean sure, you can read forcasts, but it doesnt always work out.
Hope you're not saying that people can't help as in not responsible for those outings. Or course it helps (a lot) to read forecast and use judgment, and then the % of useless trips to the beach decreases.
Another thing that helps is not go far for the hell of it. The closer, then the more "current" the wind info is, then the lesser chances of the wind dying. When I think the wind might flake out, I sail at the nearest possible on-shore spot, and I go as early as I can to take advantage.
I almost feel sorry for those poor saps here that will drive 2-3 hours for a vague hearsay the wind might be 1 knot better over there... They almost always come back bitches from those trips.