Sorry to come to this thread so late--I was away over the holiday.
Cat feces can carry toxoplasmosis, not a problem for most healthy humans, but
of significant risk to people with compromised immune systems and pregnant
women. I would be careful to note the area that you dispose of the feces just
in case one day you have someone in your house (including yourself) who wants
to garden who might be either immmune-compromised (HIV, chemotherapy, elderly)
or pregnant. Then you will be able to steer them clear of the possible hazard.