James Farrar wrote:

The problem is that most of the announcements are useless. This means
that people will tend to ignore them completely.

You want a worse one? At Stratford a lot of routine Underground
announcements (e.g. "No Smoking") have an annoying tendency to start playing
and cancelling out specific announcements about what stations a train
serves. With no destination indicators at the east end of the Ilford bound
platform, many people frequently board peak hour trains that don't stop at
their station, because the crucial announcement was cut out.