Looks more like a 14 year old kid being tough on the Internet to me, not a stalker. A real stalker would never TELL you they are stalking you, that would make you harder to stalk. They just do it.
You can find similar posts of "I can find your address by ur IP nd Im gon2kill u faggot!!" on just about any YouTube video addressed to total strangers, from total strangers. Just tryhard wannabe edge-lords "trolling" people from the protection of the anonymous nature of the web. They can say shit on the web that they wouldn't DARE say to anyone face to face, they would be shitkicked and they know it. So they sperg out on the web in total safety instead.
Just ignore those kinds of messages Pam. They are seriously not at all a threat to you, or any one or any thing except a bag of Doritos maybe.