There's something particularly unsavoury about people taking advantage of vulnerable consumers in order to make a quick buck.
This week the Bay of Plenty Times reported on a campaign launched by Consumer NZ aimed at deterring door-to-door sellers who target the vulnerable and the elderly.
The campaign involves distributing free "Do Not Knock" stickers to fight back against unethical door-to-door salespeople.
It is a sad indictment on society that such a campaign has to be launched but it appears to be sorely needed.
Consumer NZ chief executive Sue Chetwin says her organisation regularly receives complaints about the tactics used by some of these sellers.