Re: signal handling bogosities

[Richard Stallman]

    True, but the question is "What for?"  Here is my interpretation:  The
    point of highlighting certain areas when the mouse pointer is over
    that particular area is to convey some information.  Usually the
    information is "Use the second mouse button to do something".  But in
    this case the user cannot click the second mouse button to do
    something.

You can click the second mouse button then--the request won't
be processed immediately, but it will be processed.

(If your argument is valid, the real conclusion is that Emacs should
turn off the highlighting, not leave the highlighting in the place
where the mouse WAS.)