Hypercorrectness
You know who the media means by not saying who they mean when they say -

at-risk students
gang-related
gangbanger
low-income students
mob and rob
mobbing up
pack of teens
rival gang members
roving group
swarm mob
teen gang
teen mob
teen thugs
troubled youths
unarmed teen
unruly crowd
urban youths
young people
young men
youth violence