In the Fic Kurt and his room mate at Dalton go down to the mail center to pick up packages they've received. Kurt opens his and there is something really creepy in it and it addressed to his actual dorm room not just to Kurt Hummel Dalton Academy. I don't think Blaine was in the fic but he may have been. Kurt is freaked out because some Creeper knows where he sleeps and his room mate convinces him to go to Campus security who calls the cops. I think it was a WIP but I may be blending it with another story.
Found! something borrowed by sotto_voice.