Some interesting things about TV
Many people think that television encourages passive enjoyment. It is easy to sit in an armchair watching others working. Little by little, television cuts you off from the real world. Besides, a lot of programmes are even dangerous for child's development.
Many Americans are worried by the amount of violence their children see on television. In response to citizens' complaints and pressure from the Congress, the four major TV networks6 — ABC, CBS, NBC, and Fox — agreed in 1993 to inform parents of violent content at the beginning of a programme, and cable networks have agreed to give similar warnings. In 1996, the commercial and cable networks made another step and established a rating system, based on the amount of violence and bad language that a programme contains. A symbol indicating the show's rating appears on the television screen at the beginning of and during the programme.
Beginning in 1998 new television sets in the United States are equipped with a «V-chip», a device that gives parents opportunity to block out programmes they would not like their children to see.
Television, is a deadly form of subliminal conditioning. Hence why advertizers use children's TV time to promote certain fast foods, toys, clothing etc... To offer warning signs would possibly help to restrict what children actually see.