"The paper didn’t mention any potential malicious applications of the technology"
No need. The number of worthwhile uses is so low that it is safe to assume that it would be used mostly for malicious purposes.
There is no pressing need for this sort of technology in spaces where the primary purpose is for people to communicate with eachother.
One day, when an AI is sophisticated enough to be classifiable as a 'Person', then of course he/she should be allowed to comment. Otherwise, best keep them out of spaces that are already minefields of piss-poor human interaction.