The only inconvenient part is that you get absolute morons that hear words like "communicate", "warn", "react", etc, given to chemical reactions, and believe it's sentience and shit.

We know for a fact that animals think and feel, even if not on our level, and we still have no qualms about eating them.

Who's 'we' here, because I have plenty of qualms with eating animals.

Some people do have qualms about eating them, though.