"Your college room didn't "get" a spider infestation. You bred them. You had little feeding troughs under the bed and signs outside going "I, FOR ONE, WELCOME OUR NEW ARACHNID MASTERS" and tiny spider-sized duvets and everything.. You were probably running some Schindlers-List style rescue operation from the rooms of other people in your halls who killed the things on sight, as all good humans have a duty to." - oxfordgirl, of lord_sandwich
Context is hairy and eight-legged. May be unsuitable for arachnophobes.