This also happend to me with a 300 round box in the trees south-east of the NEAF.

happend to me yesterday on eu-01 exp/regular
two guys were spamming on global, talking stuff like "get off my airfield", "i see you french people", "i'll kill you bastards" and stuff like that. also they seem to use a voice changer.
one of them also typed some messages, but i was to late to write the name down.