Can you delete Canvas dashboards?

I am playing around to see if this might be useful, and have noticed two things that would prevent even a small user roll out in-house:

1) Everyone can see everyone's Canvas dashboard. There appears no way to have permissions-based access.

2) There is no obvious delete button. I looked in the "All Dashboards" section to see if I could do it from there, but no luck. So now I have two "Untitled" Canvas dashboards with no way to get rid of them.

Is this expected for the beta? And are these features on the roadmap?

Thanks in advance,

Ryan