Reftagger allows defining classes that will not be scanned for Bible references, but this is not available from the Wordpress plugin interface.
You can define a setting such as this:
noSearchClassNames: ["notag"]
This is an important feature, as I occasionally find text that's mistakenly tagged as a Bible verse that isn't (for example a date range of March 8-10 abbreviated as "Mar. 8-10" gets tagged as a reference to Mark 8-10). It would be helpful if the Wordpress interface could ask for a single class name to ignore, or even just hard-code a class name that we could use.
Thanks for considering this request.