I actually think it's a good example for students that the writers boycott. It teaches students to stand up for what they believe in.
Here's an interesting paragraph from the story:
Are the writers simply disagreeing with the NLB’s disposal process for books taken out of circulation, or do they feel that unsupervised children should be exposed to controversial topics and left to develop their own conclusions on such matters?
If unsupervised children can turn anti-family or gay by just reading the withdrawn books, then those books should be banned, and not just in Singapore.
Anyway check out the many comments from smart people in the comments section of the article linked above.