A scary possibility with AI malware would be a virus that monitors the internet for news articles about itself and modifies its code based on that. Instead of needing to contact a command and control server for the malware author to change its behavior, each agent could independently and automatically change its strategy to evade security researchers.
“Abolish corporate personhood” doesn’t go far enough. Abolish corporations. Companies over a certain size should be forced to convert to either a worker-owned co-op or a non-profit organization. Human society needs to evolve past being centered around maximizing shareholder profits.