First of all, this is pure propaganda BS at its finest.
Any kind of hacker that can potentially be dangerous knows that the best way to stay hidden is to not use your own IP (in this case we are not talking about getting onto someone else's computer and using his IP but using a public IP like the one on the airport or so).
Second, there are two types of IP: Static and Dynamic. If you have a Dynamic IP address, you will most likely be tracked down to about 150 users that have the same gateway.
3rd, You dont protect yourself from hackers, thats a myth. There are two options: You attack the hacker back (if you are luck enough to be on your guard when the hack happens) or you do damage assessment after you know you've been hacked (what kinda everyone is doing right now, sony, dropbox, steam, hilary clinton... you get the idea).
So knowing the IP from where an attack came is like knowing what gun shot the bullet that killed you. It wont stop the guy pulling the trigger, and you still dont know who the gunman is, only the gun model.
4th, What this CAN be used for is more control over the masses. Target propaganda, ad revenue, blackmail material, etc.
5th, Those who have that information are the ones that decide what they will do with it, not you. Personally I dont trust people I know nothing about too much.