lol i love these ideas

this is gonna take a while to put so much things in the game

"Those who serve no purpose, have no purpose"

How about a corded telephone receiver that acts like a boomerang an strangles it''s victim with the cord.

Then there is the hanging light - that does just that. When the victim passes underneath the lamp descends and wraps round his neck, then lifts up again. If the victim is overweight it electrocutes him as well.