Bike Parking in Defiance of Signage

Bike parked, locked to railing where it isn't supposed to be (or perhaps it's OK)

In a previous post I described this not-very-friendly sign's placement in front of the Adams Building of the Library of Congress in Washington DC. The sign is on a post that isn't bolted down, so it sort of wanders around this area. The apparent goal is to keep bikes from being locked to the railing and blocking the ramp for disabled persons, but the sign isn't clearly associated with that ramp and to put the sign on the ramp would block the ramp!

Where this bike is locked, then, isn't a problem. But the sign would suggest it is.