By Bill Mitchell 2004-03-23T00:00:00
If your advanced lighting system starts flashing to the beat of Abba's Dancing Queen, on 1 April listen carefully: a geek on the margins of society is sending you a message.
Only logged in subscribers have access to it.
Existing subscriber? LOGIN or
Subscribe for unlimited access to:
Alternatively REGISTER for free access on selected stories and sign up for email alerts