Disable automatic contact creation for Conversations

I have found a temporary fix if you wish to continue to use the Conversations Inbox.
I have saved a filter in my contacts tab that shows me any contact that was added from the conversations inbox. I run the filter daily and bulk delete the spam contacts that were added. I have done the same thing for companies.
In the “Contacts Tab”
1. Add filter

2. Search for “original source drill-down 1”

3. Select “contains exactly”

4. type in “conversations” hit enter

5. click “apply filters”

6. Save and name the filter.
Repeat steps 1-6 in the companies tab.

you can now use this filter regularly and use the checkboxes on the left-hand side to bulk delete each day/week.

The problem comes when you want to save some contacts and delete others. I have chosen to add another filter so that I can change that property and take the contact off the list.
I have chosen to add “Original Source” is any of “Offline Sources”.
We now change that field in the contacts that we want to keep (specifically we change it to “Email Marketing”)
To make it easier for my colleagues, I have also added the “original source” property to the “my view section” in the contacts panel so that it is easy to access and change. Go to “view all properties” in any contact > search properties for “original source” > Click “add to my view”