'People who want to join the boycott should go there at 2pm and assemble at the right side of the mall,' omurice said, adding they should boo when she appeared. 'If security tries to stop us, we should scatter.'

Many Net users replied that they would support the call, but some said it was nonsense. 'This is disgusting,' pinkchocolate said. 'It is like being happy at the expense of others' misfortune.'

Baptist University social work lecturer and culture critic Bottle Shiu Ka-chun said: 'It was very predictable that netizens would come out to attack Gillian after Edison Chen Koon-hei decided to quit showbiz.

'It is a witch hunt. Now that Edison has gone, people are trying to find another person to burn. It is very sad. We should really look into such violent action on the internet.'

Chung's management company, Emperor Entertainment Group, said she would be away from the city for an unknown period after the event.

Meanwhile, the Broadcasting Authority said that up to yesterday, it had received 1,518 complaints about Chung's performance on the Operation Relief 2008 charity show last Sunday. The complaints said her television appearance would have a bad influence on children.

The authority said the complaints did not fall under its jurisdiction and it would not deal with them.

TVB received 112 complaints against Chung's appearance on the Jade Solid Gold music programme on Wednesday night.

The Internet Professional Association is drafting a code of practice. President Ringo Lam said he expected it to be ready next month.

Some 1,000 association members, many of whom operate computer repair services, would follow the guidelines, which would include how to handle sensitive data in consumers' computers and advice on the law.

Chamber of Hong Kong Computer Industry members would also follow the guidelines, Mr Lam said.

The association was also working on guidelines for internet users to help them protect their privacy.