I don't know. I would be mortified by the antics of many housemates over the years if they were my family. I suppose families are thinking of their beloved little sons and daughters being isolated yet on the telly and exposed to the wide world twenty four hours a day, warts and all. Such confinement and such scrutiny are still a challenge, (especially in the eyes of their loyal loved ones who are watching avidly and anxiously, willing them to do well), though clearly nothing like undertaking some danger-filled adventure or important humanitarian enterprise.