I think the worst example I have come across of this is my employers e-invoice operator's support email address they use to dispatch error messages from. The error messages (which tend to be fairly huge) have a small disclaimer saying that they wont answer any emails and that you must call a support number that costs almost two Euros a minute. The worst bit however is that the address itself is support@einvoiceoperatorsname.com, how much do they hate their customers?