12:10 PM PT -- TMZ Sports spoke with the 3 women who bared their breasts at the World Series ... who say it's completely UNFAIR for them to be banned for life while men have been going topless at sporting events for decades!
All 3 women say their proud supporters of the "Free the Nipple" campaign and all work (and pose for) for a magazine that promotes topless equality and sexuality.
The women say they planned the stunt to raise awareness for breast cancer month (they also admit it was a plan to promote their own careers) .