Thank you! Yes that's a great suggestion to add a "flag" feature on the answers specifically. We're adding tools to report and block sites locally (for spam), but "report a bad answer" vs "report a bad site" is a great approach to this.
We don't have access to what people search or log the results or answers. So we rely on talking with our early users and reports of problems to find and fix things (along with some broad "failed intent" metrics that say what part of the system failed).
We're using HN as our model with user reported content - flagging and dead filters work well without censoring content, and it's easy to make it an option to show or hide them. I was trying to get that working for the launch post here, but ran out of time getting the Q&A feature stable :)