As usual, people are getting excitied with very sketchy information.
RELIABLE INFORMATION........
Yes the aircraft hit 2 tail stands
Yes it was taxying contrary to clearance, across a remote bay.
No they did not know they had hit them.
They were not informed by ATC until approx 10 minutes after departure.
No they did not return to Taipei.
There are already suggestions that they would have been arrested on the spot if they HAD returned to Taipei, so consider that in their thought process as well.
I'm not making excuses, merely stating facts.
If YOU had hit something minor, and there was no debris at the scene, and the aircraft was behaving normally, would YOU return to Taipei with the high likelihood of your arrest bearing in mind the treatment of the SQ6 crew?? Maybe not as easy a decision as you may think???
With regards to the error in the first place, well take a look at the chart and decide for yourself. If you havent been to taipei, then pass judgement cautiously!