I think SCP-517 should be included in a future update. It wouldn't be as hostile an SCP as others, and perhaps it's file could be mildly damaged, to help make what it does obscure to people not familiar with it.
If the player happens to have activated SCP-517, and the computer time had become 1:43 A.M., then the arms would begin to appear and slowly reach after the player, as time passes more arms will emerge closer to the player and travel faster. Once they get to the player maybe a quick death animation could occur where the player is flung onto their back and dragged screaming into blackness.
It would be a good SCP, but wouldn't be overly dangerous to players, unless you like playing at 1 in the morning.
SCP-517