While I agree it's almost always a bad idea: effectively every design team I've encountered has requested stuff like this. So yes, it's extremely common. It's

While I agree it's almost always a bad idea: effectively every design team I've encountered has requested stuff like this. So yes, it's extremely common. It's done on tons of websites, for tons of mail addresses (ever receive an all-uppercase address on a delivery? same issue.), and tons and tons and tons of emails and legal documents (woe to those with last names like McCormick).