I do not think that, given the circumstances, the "citywide lockdown" was excessively excessive. These guys were out for blood, had no respect for human life, and used explosives. Security personnel were murdered and injured - perhaps this lockdown prevented civilians from meeting a similar fate.
That, and I highly doubt this sort of measure would be taken again anytime soon. Sometimes you DO need to sacrifice liberty for security for a minute in the real world. Just as long as it's not abused, like any power.
I disagree completely. Also, if someone put themselves in harm's way, that's on that person. Civil liberties of the population should never be suspended. Ever. Hoping people do not abuse power is ridiculous. The cops were out for revenge over the university cop that was killed. It had nothing to do with the people of Boston.