There are two ways to do this. I thought of the second one first but the first one is easier. I'll include both for completeness.
1. Because the cells you want to protect are locked, you can simply protect the worksheets and uncheck the option that allows users to "select locked cells." However, that means that they can't select them at all, so won't be able to copy data from locked cells. If you really want to prevent this then you can also add a password.
2. If you can install macros in the users' workbooks and require them to allow macros to run, you can use the following to allow users to select cells but disable double-clicks:
If there are multiple worksheets, this would have to be added to each one.
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