 It is believed that television advertisements often encourage people further into consumerism by promoting expensive objects which are often unnecessary and ultimately unsatisfying (a satisfied customer may not need to make further purchases).The presentation of these to people who are tired or not concentrating is a further risk to their behavioural development.However, it is recognised that television is a convenient baby-sitter, and that some programs are enjoyable ("The Idle Parent" contains a list of the author's favourites).