IMO Existing resources available via the Internet will provide a sufficient medium through which survivors experiencing "just saw this movie" whiplashes will be able to find help, comfort, reassurance, healing, validation and whatever else may come their way during this... as we know it to be, a most stressful time. I believe that the hotline route will only complicate matters and may actually limit, to some degree or another, that response. If it aint broke, don't fix it comes to mind too. I mean, folks have done OK to this point, and a simple link at the end of the movie seems like the best idea. Once they are there, they will have the most widely available support they could ever imagine.
As far as disclaimers go, simply marketing the film by its name alone will be enough stimulation to set off most former clients' memories...
:peace:
RG