I spend as much time in Boston as I do in LA, so I keep a car at a lot in East Boston.
When I have checked baggage, I get off the plane, take the bus to East Boston, get my car, drive back to terminal B and park, and walk into the baggage area. Most times, my baggage has not yet arrived.
AA, are you reading these messages? As they all show, your Boston baggage system is broken. Fix it.