Except they really are NOT. Almost no actual cases of such phrases being used by extremists. The three letters F B I are much better indicators of possible nefarious, and extremist activity.
DNC
CIA
FBI
DEA
ATF
OBAMA
BIDEN
HARRIS
ABC
BBC
CBS
CNN
FOX
MSNBC
NBC
NATIONAL PUBLIC RADIO
THE VIEW
DISNEY
ESPN
LGBTQXXX