Michael Hoffman wrote:


I'm not puzzled that people leave things on the train. I'm puzzled at
the thought that announcement would actually reduce the number of
people who leave things on the train. Is there any data to suggest
this, or is it a knee-jerk reaction to the problem?

People have been leaving their property on underground trains since 1863.
The announcements you refer to have only been in use for ten years or so.
Hardly knee-jerk.

(But I do agree they are a serious pain.)