The point is, why would someone use the full name and photo of another person - to deceive? a mad fanboy? a celebrity stalker? Or the real deal. All are legitimate possibilities!
I've learned that we (humans) haven't really learned how to use the Internet yet. Perhaps it's just me (this human)?
I think it's good practice to always be cautious and understand that the "person" (it could be an AI robot now-a-days) on the other side
may have good or bad intentions, can be mature or childish, may be nice or a troll, can have a very different opinion than you, AND may be impersonating someone, sometimes because they are fooling around, are sick or have nefarious intentions.
For example, just recently, a family member I don't really interact with much sent me a friend request on Facebook. He's older and I figured he's only getting the hang of social media now. I accepted and sent him a message, "Hi, good to hear from you. Hope you're well. How is Pili (his wife)?". His wife had a stroke and is recovering.
I got the following response, "Doing well thanks. Pili is well. How are you doing?"
I was about to respond when my Spidey sense told me something seemed off. That's not how he speaks. So I went back on Facebook and searched for his name. Sure enough, there were two accounts with one of them saying that his original account was hacked and to not accept friend requests. I immediately blocked the account I had just accepted.
Moral of the story, there are nefarious actors out there and you need to be careful. I can see someone pretend to be a famous celebrity to get someone who is a fan to believe they are dealing with the real deal. That's dangerous in many ways.
This is one of the reasons I like forums like ScapeCrunch. You get to know people more than just 140 lines (Twitter) or the very superficial conversations on Facebook.