Several people concluding Bobby could have handled the situation better. I agree, but I sympathize with Bobby because I've been in his shoes.

Folks there are several people that come to startup weekends with pre-planned businesses, looking for cheap labor (aka "fucking nerds") to push them off into profitability. When you enter any kind of hackathon it's on you to recognize these people before you choose to engage in assisting them, and if you dont, you have a bit of yourself to blame after the fact.