Doesn't it already accomplish this? The game accepts an input every n frames; if the chat has a higher occurrence of a certain key input it has a higher chance of accepting that one.
Was considering of doing a similar thing for accepting candidates for my house. My plan was to take all the responses, strip all references to locations, and then randomly send them to every listing in every other major metropolitan area. The one that got the most callbacks I would then callback. In the end, my roommates read through all the responses and I didn't have to do any work.