Answer: flamewar

AnswerCrossword Clue
FLAMEWAR

Fierce online blogging battle

FLAMEWAR

Lovers' quarrel, intensified?

FLAMEWAR

Result of provocative posters?

FLAMEWAR
Nasty online argument
FLAMEWAR
What a troll may perpetuate
FLAMEWARSelf-centered Internet fight?
FLAMEWARDisruptive online event