I wonder at what point it's worthwhile to have a group to park at some mall and rent a van to drive to the stadium parking.
If any positive outcome is possible here, I'd be nice if this gets people accustomed to carpooling to such events. Sure would be nice though if these stadiums would be serviced by more effective transportation.
Presumably such a site would be visually obvious as parody. Having it give jokey answers in as a caricature would be one thing. If you dressed it up as a professional legal advice service for opinions on criminal law from Alan Shore, that could be problematic.
At a certain point of information sharing, we should want a high bar for the ones providing the answers. When asking nuanced questions, we should want for the answer to come from knowledge, not memory. I made an example in this other comment.
I'm not sure I agree with your 'right answer' bit. Personally, I'd prefer dumb people to be protected in a similar way that I want the elderly protected from losing their savings from an email scam.