Bottom post of the previous page:
Trash piles. Make certain items clump together into piles that are annoying to sift through. Piles slow movement and if they get too high they even block movement. Very high piles might even collapse some of their contents onto adjacent turfs, "spreading" the trash outwards. You could build a giant piles of knives, throw someone into it and then have them get impaled by them as the pile collapses. Or you could block the trash chute in the post office and watch the trash slowly pile into the corridor and eventually block it.In fact, why not add onto it while at it? Have certain machines produce radioactive waste that irridiates people, poisonous waste and so on. Add barrels to store this kind of waste, and special suits to protect yourself. Unload said radioactive waste into the hallways for traitoring fun.