Why should Jade do anything with respect. Its a game show and she was having a laugh at the other house mates expense. BB was too, which is why they had Jack deliver the second batch of goodies.
Everyone moans when the likes of Jack follows protocol and refuses the car for "the good of the house" But when Jade tries to have a laugh, everyone calls her an inconsiderate liar
I for one much prefer a housemate that is prepared to be a bit different and have a laugh, than be a stereo typical BB bore.