Momo... I find your experience of the tables in CW to be rather interesting. I work almost all my flights in the CW cabin and although I agree that they are not the most stable of tables, I have never seen someones wine glass just "fall off" the end of the table by its self. You must be exceptionally unlucky for this to keep happening on your flights.
As I say, I am not arguing your point, just think you must be exceptionally unlucky.