People tend to check in during these times:
There's 3G service down here. Check your email while you wait for the G to never come.
file a complaint to 311 that the emergency door at the southbound warren st exit is TOO LOUD, doesn't deter people from using it, and is often used by parents with children making it unsafe.
This station was featured in the 1990 film 'Jacob's Ladder' starring Tim Robbins.
Go one extra stop to Carroll St station if you need to go the opposite direction because there is no under/over pass here. Also, watch out for punk kids come 3pm.
Check for service updates on weekends since there is a great chance the F train is not in service.