No this may seem a bit getting off-topic of a topic which is in itself off-topic.
In the movie "The Running Man", a great action movie from the 80's, Schwarzenegger plays a role in a violent game show in the near future. People who are wrongfully convicted of a crime are hunted down by killers called stalkers.
One of those stalkers hits a guy in the face, after which the guy is actually thankful for having received some attention from his hero..
Yes, it's true, such fans exist!
Hope you don't mind me paraphrasing a Schwarzenegger movie..
Anyway, Elvis was a great celebrity, if I have to use that somewhat silly word. In some cases, his gentle character was exploited / taken advantage of. I recall some "fan" took the ring off his finger while Elvis was feeling hazy in 1976. Such a thing might also happen..
Sorry if I can't prove that story. Prove me wrong in case it is bollocks (Brit., slang).