Employees who could be sacked for storing offensivematerial on their PC were unlikely to give it a filename that exactly described its contents, said Mr Frost.
The music industry already places parental advisory "explicit content" labels on records with sexually graphic or violent lyrics, but does not give details of the offensivematerial.
"There's no guarantee that they are going to be able to get the offensivematerial out of the system quickly, " said Geoff Haggart, European head of filtering firm WebSense.
"The parents decide what values their kids receive, " says marketing VP Glenn Zawicki, who adds that the company filters out offensivematerial and that poor content is nixed through customer ratings.
Broadcasters are also expected to apply "generally accepted standards" to provide adequate protection for members of the public from offensivematerial, and must ensure that potentially offensivematerial is justified by the context.