Some stopped driving. The bus or subway is safer. When police come into the neighborhood, or rumors circulate of an impending immigration raid, some people stay inside and keep sons and daughters home from school. Some parents counsel their kids to never mention their immigration status, lest a child's slip put the family in jeopardy. Some people have begun using encrypted email systems, or communicating through protective apps, after learning that the Department of Homeland Security intended to collect social-media information on immigrants.