Feature Request: Disable name suggestions(auto-complete) in the Requester/CC Field.

Overview of feature request and and those affected by this issue.
We support many customers.
Because we use both email and web forms with our customers, we often make changes to our requester or add additional people to our CC.
It is convenient to see suggestions in the name input for the Requester and CC recipients, but it also causes misdirected email.

What problem do we see this solving? 
We are afraid that we will lose costomer's trust by sending a misdirected email.
We can prevent a misdirected email from being sent by disabling the name suggestions(auto-complete) of the Requester and CC recipients.

When was the last time we were affected by this lack of functionality, or specific tool? What happened? How often does this problem occur and how does this impact our business?
In the year since we started using Zendesk, we have had more than 5 mis-sent emails. Recently, we sent an email incorrectly a week ago. We apologize to the customer for this problem.

Are you currently using a workaround to solve this problem?
No.

What would be your ideal solution to this problem? How would it work or function?

We want the option to disable the display of suggestions if we enter a name.
And it is ideal to display the correct name and email address in the requestor and CC only when the email address matches exactly.