I attended an Integrated Warning Team conference a few weeks back that addressed these issues to the core. It is becoming clear that people are becoming complacent with sirens and most do not seek shelter at the first run of a siren. So, this conference addressed that issue and asked "what can we do to make sure people are still taking warnings and watches seriously?"
The conference was filled with various people; some from the State of Indiana (IDHS), local emergency managers, NWS (Indy, Northern Indiana, Paducah I believe, and Wilmington), broadcast meteorologists, and various others. Each had an interesting point of view on what the next steps should be. Some believed that the siren system should be removed completely, others believed that sirens should not be removed (for some still rely on them completely), but other means of notification should be made.
Another interesting topic that was brought up in the conference was education to the public. It is going to be a nice start for us to begin a survey, distributed to the public, that asks them how they perceive watches and warnings and the actions that they take. It might also be good to know what the public would like to see if they are not going to take each warning seriously.
I could go on and on forever about this conference but the assessment has really highlighted the points that were brought up here in Indiana. A lot of things to discuss in the future, that's for sure.