As reported on Philebrity:

SEPTA is to Philadelphia as MARTA is to Atlanta as BART is to the Bay etcetera…And if you have ever had the pleasure of relying on SEPTA for transpo to school or work- I’m sure you will feel the sentiments of this prankster- who replaced the actually ‘Notice to the Public’ plaques with the following text:
SEPTA
Notice to the Public
The Southeastern Pennsylvania Transportation Authority (SEPTA) is committed to providing non-discriminatory transportation services to all of its passengers, including schizophrenics, drug addicts, Irish Catholics, hipsters, homos, prostitutes, gentrifying transplants, raging maniacs, tourists, obnoxious Penn students, corner boys, pimps, drunk rich kids who still think Old City is cool, and terrified suburbanites who tremble with unease at the sight of everyone.
Any person who is or seeks to be a patron of any SEPTA public vehicle shall be entitled to the same depressing experience of loud cell phones, obese people eating McDonalds, parents telling their toddlers to “Shut the Fuck Up!,” and a constant inch-deep layer of urine-soaked trash and debris.
No person or group of persons shall be discriminated against on any grounds with regard to routing, scheduling, or quality of transportation service furnished by SEPTA, with the following exceptions — race, color, socioeconomic status, and proximity to the suburbs.
Any person who has experienced a cleaner, more efficient, more extensive and better managed public transportation system in the U.S. (e.g. most if not all) can feel free to notify SEPTA about potential improvements, which shall promptly be ignored.
So true! Especially the part about cursing out the babies :’(