@snood,
No, they certainly are not all plants. That was true also with the PUMA phenomenon, many were angry that Hillary hadn't won. But at that time, I took a full two months to dig down into what was going on and the serious organizational aspect of this was clearly GOP aligned - hundreds of linked social media entities and many of those with clearly racist content and almost none with stated support for Clinton or progressive policies. Once again, the typical technique of astro-turf scams.
Chaos, sewing the notion of disunity, trying to foment disaffection are the goals, yes. But past that, another element is the creation or strengthening of a narrative that Hillary is not a legitimate candidate and therefore, when she arrives in office, will not be a legitimate president. And from that will spring all of the right wing malice and obstruction which is guaranteed to happen up the road. Because that is what the modern right has become.