I posted a picture of my son on Snapchat and this guy i don’t even know but have on Snapchat screen…

I posted a picture of my son on Snapchat and this guy i don’t even know but have on Snapchat screen shot the pic of my son and posted it on his Snapchat like it was his son.... like why do people do shit like that? I don’t understand? I would never screen shot another person’s baby and pretend it’s mine like wtf.