Did any ICO ever result in anything useful?
Yes, there is a humongous number of scammy projects. But there are also projects working really hard to succeed and they deserve a chance. Right now I'm particularly impressed by what Augur pulled off, it's not certain whether it will succeed long term but credit should be given where it's due.
I think I can spot the weak link in this system.
Think it won't work? Go get your bug bounty, or even put in a massive short and then break it.