All of these measures would be justified IF this event had high lethality or morbidity.
If 20% of the cases in Mexico went blind (for example), we would be DEMANDING that all these things be done.
The lethality of A/California/04/2009 is far from clear, however.
Here is a link to the conference call page with number and pass code. Anyone can listen in, apparently. They are about to talk about quarantine and other social distancing laws. Right now, talking about emergency declarations.