Advertising for addictive substances is found in all forms of mass media: printed in magazines, newspapers, and journals; heard live on the radio; viewed on television. It is not uncommon to find covert advertising - the mention of a brand name, for instance - in non-commercial articles or programmes. Such advertising is indiscriminate and widespread. Minors may be forbidden by law to purchase alcohol or tobacco, but they are constantly confronted with advertising promoting its use. Communities that want to limit substance abuse cannot close their borders to the media and its positive image of addictive substances.