Idea: have a "report DuoBot" button to report an amusing sentence translation for all to see, vote on, comment on, and learn from.
The best translation could be shown alongside the bot translation for comparison.
Having seen so many bot translations, I don't find them amusing at all... In fact, one of them was picked as "the best," and the sentence was pronounced 100% translated! I thought at least these evaluations were done by a human being, but evidently not...
This would be more fun with Japanese as English <=> Japanese machine translations tend to be very poor.
I find Duobot to be really funny, especially when my translation is wrong based on a robot. I used to cut and paste with this happened in the comment section, but gave it up. I have had some good laughs from that robot through the months.