The only "special protection" that elderly people need to escape a 25 year-old crazed gunman bent on killing is a shotgun.
Your argument could just as easily be used to provide "special sentencing" guidelines for crime victims who are asthmatics, have heart trouble, didn't get enough sleep the night before, etc. Before you know it, we'll find that 100% of the U.S. population has a "disability" of some sort.
That seems to be the only way to get back to equal protection. :(