  Mainstream literature on spontaneous wave function collapse never reflects on
or profit from the formal coincidence and conceptual relationship with standard
collapse under time-continuous quantum measurement (monitoring). I propose some
easy lessons of standard monitoring theory which would make spontaneous
collapse models revise some of their claims. In particular, the objective
detection of spontaneous collapse remains impossible as long as the correct
identification of what corresponds to the signal in standard monitoring is
missing from spontaneous collapse models, the physical detectability of the
"signal" is not stated explicitly and, finally, the principles of physical
detection are not revealed.
