This Is a PSA!

FYI, there is such a thing as being too close, even while commuting herd-style on the T. I thought this would be fairly obvious, but just to reiterate: just because we're on the Cambridge-bound redline does not mean we're headed to Europe with its small notions of personal body space. When I'm facing a wall, do not lean into my back or I will get my self-defense articles. Got me?