On-topic: I am currently at our summer cottage, and there are some kids of my siblings here too. I learned a few (pre-)teenage girls were playing Slender Man on their smartphones, and kept screaming about it all the time. It was quite funny watch them play it, they got spooked so easily and kept throwing the smartphone away as soon as they saw the Slender Man. :D
Anyway, I instantly recalled they I just bought Slender: The Arrival from GOG, so I told them about it. Naturally they wanted to play it, so I installed it on my laptop. First they were "Awww, this isn't as scary" because the game starts in daylight, but as soon as the game became dark, yikes!
Their reaction to the game was so strong that I was seriously starting to fear myself that they do this to my expensive gaming laptop, especially as one kept poking the screen with her finger (this is not a touchscreen tablet!!!):
http://www.youtube.com/watch?v=lyTC8wL4RSA Anyway, after awhile they hit
<span class="bold">this bug</span>, so their gaming session fortunately ended there, and my laptop was safe.
I became interested in the Slender Man mythos. For some reason I've been mostly unaware of it, albeit I do remember reading about the first freeware game "Eight Pages" here. So I also installed the freeware game to my PC and tried it out. Ok, interesting concept and I see why some find it scary, but the gameplay is based too much on luck.
I also checked the beginning of the free Slender Man indie movie, I'll have to watch it sometime. I'm completely behind with this Slender Man graze, but that's fine I guess.
I hope GOG gets a fix/update to Slender: Arrival soon. For me the game ended in that bug.