saper makan cili terasa lah pedasnyer.. there is a BIG difference between constructive comments or nonsense. Commenting on the price others set isconsidered unethical if you do not have any intention of buying. It's like you ask durian sellers to layan you and in the end you are really not interested to buy. If that is the case then why bother to "comment" anyway? It is simply nonsense. An educator should know better!