That's for sure! A tech savvy criminal can find the IP address for someone posting online, then quickly identify the home address of that computer....and then, the burglary, or worse, can occur. I am constantly amazed at the amount of personal information that some people post online....especially on these social media sites. How much money a person carries, or might have stashed away, should Never be discussed online.
I remember back when message boards would show your IP address as a part of your posts. But back then most people were on dial-up and the IP addresses would change with every new boot up, and it would reflect where the ISP was headquartered. There were times when two of us posters had the same IP address. We joked about that.
Now, apparently there's a way to spoof one's IP address.