As resistance to foreclosure evictions grows among homeowners, community leaders and some law enforcement officials, a broad civil disobedience campaign is starting in New York and other cities to support families who refuse orders to vacate their homes.

The community organizing group Acorn unveiled the campaign with a spirited rally on Friday at a Brooklyn church and will roll it out in at least 22 other cities in the coming weeks. Through phone trees, Web pages and text-messaging networks, the effort will connect families facing eviction with volunteers who will stand at their side as officers arrive, even if it means risking arrest.

“You want to haul us out to jail? Fine. Let the world see how government has been ineffective,” Bertha Lewis, Acorn’s chief organizer, said in an interview. “Politicians have helped banks, but they haven’t helped families in the way that it’s needed, and these families are now saying, enough is enough.”

At the onset of the foreclosure crisis, the problem was regarded by some as one of a homeowner’s own making, the result of irresponsible decisions made by families who chose to live beyond their means. But as foreclosures spread across the country, devastating even solidly middle-class communities, the blame has slowly shifted to the financial companies that made questionable loans and have received billions of dollars in federal aid to stave off collapse.