In so many of the instances in which the popular press (and the general public) apply the label "trolling," they're referring to sincere statements from people who believe every word they're saying. These alleged "trolls" have myriad intentions that may include getting a rise out of their target, but also include silencing their target, humiliating their target, inspiring fear or emotional distress in their target, etc etc etc. It's not provocation merely for provocation's sake, and the stakes are much higher. We don't need special Internet words for hate speech, harassment, or death threats. These words already exist.