It's not suprising that packages and briefcases left on a park bench cause a similar but smaller reaction. So should we outlaw briefcases just because some people got too involved watching "24" the night before? The Boston are as predictable as most lefty totalitarians are.
As I said before, if I had my druthers, it would come down to a question of intent. There is a big difference between accidently leaving a briefcase in a park and intentionally provoking a police response.