Search and Offline availability setting - from script

Hi,

Is it possible to find out (script/PowerShell) what sites have the 'Allow this site to appear in search results' radio button set?

And what lists have the'Allow items from this list to appear in search results'?

Thanks.

And on roughly the same subject, is it possible to disable this radio button for any new site that is created by users so that we can make every site/list available to search?