Since October 2006, the MBTA has been conducting random security inspections at stations throughout the system. The move was re-instituted by former Governor Mitt Romney.
The bag checks, according to the MBTA, take roughly 10 to 20 seconds and are done at random, “as part of an overall layered strategy to deter and prevent a terrorist attack.”
Passengers can refuse a bag test and check, however, they will not be allowed to ride the T if they do, according to the MBTA’s website.
This is another example of Security Theater. The terrorist can just refuse the inspection and walk to the next station.