It'd be real nice if someone created a browser addon that auto-downvoted these same comments and puns. With enough users you could wipe out anyone wanting to make the comments when they get 100 down votes just by people with the addon loading the comments section.
Yeah, automatic voting gets dangerously close to automatic censorship and botting.
Also, human language, context and nuance is complicated and the unknown error bar on "correctly flagged posts" scares me. It's not entirely predictable what kind of posts people may make, and accordingly not entirely predictable what the plugin would and wouldn't recognise.
A post chain "Madness?" / "THIS" / "IS" / "SPARTA!" may make sense and be fun in the right context, but the "THIS" comment could get botted to hell.