Let me recap this to make sure I haven't gone astray:
Researcher has a beef with a manufacturer, so he chooses to not follow responsible disclosure protocols. Since the vulnerable products have already been sold by said manufacturer, it is in fact the consumers that will likely bear the immediate consequences of the researcher's ire. The disclosed vulnerabilities will likely be snapped up by cybercrims, who will surely be eager to have another platform upon which to build a botnet. Once the DDoSes start, then it's not just the consumers suffering the consequences of the researcher's ire, but also the Internet-at-large.
Because a researcher has a beef with a manufacturer.
Did I get that right?