A couple of excellent quotes from a "management source" at Hong Kong Ailrines in the SCMP:
A management source at Hong Kong Airlines pointed out that the apron markings and lighting at Chek Lap Kok were so clear, a pilot would have to be "really, really stupid" to attempt to take off from a taxiway.
"The runway in Hong Kong is super-duper", he said. "It is a very colourful runway. You can see the lights very clearly, especially at 4 o'clock in the morning. So you have to be really, really stupid to try to take off from a taxiway with green lights".
But it's good to see they're on top of the situation now and doing their utmost to ensure it won't happen again:
"We have also given everybody a map of the airport and told them "go home and study it before you sleep - that's where the runway is, so remember it" he said.