On July 24, 2018, Debra Blake was banished from every park in Grants Pass, Oregon. She added the exclusion order to a growing pile of violations—for sleeping, sitting, camping, and trespassing, a mix of civil and criminal charges that accrued late fees, bench warrants, and jail stints, wrecked her credit and job prospects, and made her a known entity to police. At 59, Blake had lived in Grants Pass for almost 15 years, seven without a home. She didn’t qualify for a bed in the town’s only shelter...