Have your fare ready! Tonight at South Station staff will be checking tickets and passes prior to boarding. #fareisfair
— MBTA Commuter Rail (@MBTA_CR) October 27, 2015
I don't know why, but this operation has always really annoyed me. They don't do it very much, but why do it at all? I can't figure out the logic behind it. If anyone can shed some light on this, I'd love to hear a valid explanation. My thoughts (after the "read more"):