I'm currently trying to buy a job-lot of lampshades, having found one I like. The two I've got my hands on so far have been packed in particularly shoddy polystyrene: the packing is apparently supposed to be big blocks, but it's half crumbled into individual crumbs by the time I get it out of the box. Ideal for beanbag-filling, I'd say: you don't have to spend too much effort on dismembering it. And I'm still expecting six more lampshades (once BHS find the gear lever on their arse) which will probably be similarly packed :-)
(What is "bed-blocking" in this context? A quick google suggested that it's something to do with NHS ward management, which seemed unlikely.)