I was on the computer last night when I stumbled across the Chicago Transit Authority's "Filming and Photographing Guidelines."
The guidelines cover insurance needs, right of entry fees ($2,000 a day? Charge Michael Bay more, please?) and other stuff. Then there is this on Page 3, Item 3:
"In general, filming and photography must not portray public transportation as an unsafe and dangerous environment. Filming must not include scenes that contains the following: suicide, attempted suicide by train, pushing to track level; re-creation of real life traumatic and violent events (e.g.