Possible Clues:

• Nasty online argument
• Disruptive online event
• Trolls insulting each other online, e.g
• Cross words online
• Battle with trolls, say
• An acrimonious dispute conducted on a public electronic forum
• What a troll may perpetuate
• Acrimonious exchange of emails
• Vitriolic postings
• Result of provocative posters?