Matter of SEG, 24 I. & N. Dec. 579 (BIA Jul. 30, 2008) (neither Salvadoran youth who have been subjected to recruitment efforts by the MS-13 gang and who have rejected or resisted membership in the gang based on their own personal, moral, and religious opposition to the gang's values and activities nor their family members constitute a "particular social group.").
http://www.usdoj.gov/eoir/vll/intdec/vol24/3617.pdf