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Sounds like a terrible idea to me. You're using your most precious (and expensive) human resources to do a task that doesn't require them. Part of the function of ITIL practices in the support team (assuming you're large enough to have a support team) is to notice trends in help desk calls and feature requests, condense that information, and present it to the development team in an organized, coherent manner. If that's not enough to keep your developers grounded in reality, send some of them on site visits once in a while to observe real users trying to do real work with your software.