Buckets of gunge above the door when they open ruining their hair/eviction outfits
Maybe the travelator I mentioned in another thread (off Gladiators) and no stairs on the outside ... that would be fun
Put the evictee in stocks and let the housemates chuck stuff (inspiration from Vanessa's eviction in BB6

)
I'm quite sadistic aren't I ... hmm sadism is the way forward for BB