Remove Specific Interesting Moment and Email History from Sales Insight

Hope someone has figured out how to do this:

I'd like to hide one specific email batch campaign from showing in Marketo Sales Insight. This campaign was already deployed. We have the standard installation of Sales Insight, which shows Interesting Moments, web history and email history to Sales.

We would prefer not to allow our teams to see who received and clicked this specific campaign for confidentiality reasons.

Is this at all possible after the email has already been sent? How can I hide only the activity for this campaign?

Thank you!