You might want to check out the laws in your local community.
As times get tougher, watch as more and more people start their own gardens, or try other things like bee keeping or raising chickens. This is going to cause problems when the less informed people in your community start complaining to their local governments. And we have all heard of horror stories of some clueless local official worrying more about what the letter of the Law not the spirit of the Law.
While Green Wizardry is very much the passive way, don't forget that passive doesn't mean roll over and die. Get involved in your local governance. Help elect politicians that will help people cope with the changes that are coming.
(oh and sign the petitions linked in the article...)