It’s a tough call. Many forums have a rule against changing the title at all.
Those forums are wrong. A title should accurately reflect the content. We can’t choose the title other websites choose… but we can choose a title for our posts and we should take advantage of that.
Also - if you find yourself posting on a forum with that rule, just ignore it. And then tell them the title you typed out yourself was copy/pasted. They’ll have no way of knowing since so many news services A/B test titles anyway.
Here’s the tile I would’ve used: “Police Alert Parents to iPhone’s Automatic Contact Sharing Feature” — I think we can agree it’s more accurate than the deliberately unclear title this post currently has.