They all do it – nice (possibly) form to fill in on the web, where you put your carefully crafted message to tell them their service was great/crap or simply ask a question.
But the response never, ever, actually includes the message you sent; and because they made you bypass your email system, usually on the grounds of security, you have to keep a copy somewhere else to work out what the hell their response means.
Do any of them actually try being a user of the system, or just watch someone going through the process of communicating with them?