This sounds to me like a few of the "higher-up" transit employees are trying to cover their own asses (not that they could have prevented an exploit). But would Massachusetts government employees really go through all this legal action to discredit others in order to save face?
Let's not forget the Boston area "Lite-Brite / Improvised Explosive Device" scare when the city flipped out over a few signs placed in areas with high foot traffic and on some bridges.
If you don't remember, an advertising company, contracted by Cartoon Network's daughter network [adult swim] to place several light up signs in Boston that had a "home made" appearance.
After the signs had been in place for a few WEEKS, Boston officials finally acted, by making arrests, and stating that the signs "...had all the components of an improvised explosive device, except the explosive..." (so does a clock radio).
So this major fowl up illustrated one of two things, Bostonian law enforcement are unable to identify I.E.D.s (if these signs did not resemble bombs), or that actual bombs could, in fact, be placed in Boston for weeks without detection (if the signs did resemble bombs).
So, yes, in Massachusetts, the city and other local governments will censor your Freedom of Speech if it makes them look ignorant.
But I think everything could be worked out if everyone would just get together and discuss it. Maybe over a cup of tea? It could be like a party. In Boston. They could call it The Boston Tea... Oh wait, that name is already taken.
Paris Hilton, because sometimes, Massachusetts is just as clueless.