Cry Wolf

What was the lesson of this fable? Cry wolf once and people will support you. Maybe even twice. But cry wolf all the time and people are desensitized to your attempts at attention, realize you're not person that can be relied on, and you'll end up all alone with no one to help you.

So just like picking your battles, you should pick the few and far between times when you want people to come to your aid when you call.