I've been browsing through several studies on user acceptance of biometrics, and I've been noticing that they all focus on attitudes and beliefs about biometrics. While it's important to know a sizeable portion of the population has objections to using biometrics in certain circumstances for various reasons, I am much more interested in knowing if people with such objections will resist if biometric authentication is made mandatory in the workplace. What are some of the ways you have seen people negatively react to it beyond complaining? How long does the defiance last?
Ultimately, how important is user acceptance when deciding whether to deploy biometric authentication?
To clarify, I am most interested in hearing any stories of pushback due to non-usability reasons, such as privacy concerns, feelings of awkwardness when authenticating, plain old resistance to change, or fear that someone will cut off your finger to access your account. I tend to dismiss such concerns as whining that will go away after awhile, but I can't take the risk of assuming that I'm right.