Back in March we learned about just how many people don't stand up for people with disabilities while riding public transit. At the time, NYC Transit's Paul Fleuranges told us about a new campaign coming up, and now CityRoom points out that it's launched. With a firmer tone than the ads have had in the past, the new posters remind straphangers that not all disabilities are visible, and declare that giving up one's seat is "not only polite, it’s the law." Fleuranges commented that "It's the first time we've really stressed this," and warned that those who won't give up their seat on request will face up to a $50 fine. But with robotic trains, a slimmed down staff, and no one on hand to even gauge the effectiveness of the campaign, how will it even be enforced on subways?