Dear Wisma Atria,
Given your decision to ban construction workers from using your toilets, I have no choice but to boycott your shopping mall. I am a third-generation Singaporean, and both my grandfathers worked as coolies. You would have refused them the right to use basic bathroom facilities.
You are worse than the colonialists who used to put up "No dogs and no Chinese" outside their clubhouses. I will not reverse my decision until disciplinary action has been taken against the member of staff who approved this.
Sent to email@example.com and posted on the Wisma Atria Facebook page.
PS: This is a public letter. Go ahead and share.