I would be very surprised if they weren't already keeping tabs on this thread. It's been linked multiple times in the backer comments area.
With the open hostility though, they would have to be crazy to agree to an interview.
From my POV, the "hostility" is directed only at bullshit claims, not at the Mu guys themselves, or the device itself. And the simple truth is that if the Mu guys have answers to reasonable questions, then they have nothing to worry about.
If you read the comments thread on IGG, the Mu guys selectively answer questions that they have easy answers for. They do not answer *any* questions that commit them to disclosing any details about the project, even those that only ask about logistical issues or project timeline issues and do not ever broach the technical aspects. For example, one guy asked them to explain why they previously said they had a case and now say they are working on a case. Another asked for details on how many revisions of the PCB they have gone through and if they had infact ordered PCB's. When the legitimacy of the project is seriously undermined, those are very reasonable questions - and they are questions the Mu guys refuse to answer. Answering them cannot betray any confidential or competitive information, so there must be an alternative reason they have refused to answer.
So yes, I think if they went on Amp Hour and refused to answer basic questions, they would not look very good to the audience. Which is why they are refusing to be questioned (through refusal to answer) - because the answers will make them look bad.