My company recently hired a 3rd party marketing company to do an anonymous survey of its workers. Mostly geared toward how we see companies in general in the same line of work. Typical useless info that the company already has with a sprinkling of company feedback. The kicker? One question asks for your role and a second asks for your postal code.
I've read enough posts about surveys that end with the company finding out who is posting what. Not gonna be apart of that.