Notification / Exception Report when a line item is deleted from a Sales Or

Hi ,

Please find my below doubts and let me have your suggestions if any.

1) Is there any way to restrict the users (delete/ grade out the line item delete button) to delete the Line items in the sales order?

2)If we delete the line item in the sales order, normally we can check this in change logs and it shows the deleted Line item number only.

I want to identify a deleted line item whole history( like materai, quantity,,,,in that line item) and can it be reported in any manner.