Normally, I would agree, but in this case making it publicly
known that you [or your pet, etc.] were attacked by the cat,
and the cat was killed only to defend yourselves.
BUT, you had also better have some solid proof of the attack.
Shooting a big cat (or bear) just because it was in your vicinity
will not be an acceptable reason, but if the critter charges and
you have to kill it in self defense, well, that's different.
I would use every trick/tactic I know in order to avoid an attack,
but if one did happen (and I was in Calif.) my first call would be
to Calif. Fish & Wildlife to advise them of the situation. Immediately
after hanging up with them I'd be calling every news source
and media outlet I could get ahold of. Making the public aware
of the carnage these apex predators can cause will change
minds. Even full-blown bunny huggers don't want their kids
digesting in a cougars gut.
The only way this situation is ever going to change is if the
general public is made aware of the overpopulation of the
cats and bears. You get enough mothers worried about their
kids playing in the yard, and you won't be able to shut
them up until the current law is repealed and a hunting season
is set up to reduce the population.