Yes, it was unprofessional for Blog2u.sg to mass send emails with every single publishers' email made visible to all under the "To:" field. The damage done is irreversible.
But since Paddy personally replied my email within 20min (plus another mass sent to all publishers) and sincerely apologized for the mistake, I think we should forgive them. =)
That's all I've got to say...
Sample screenshot below (censored):