No, that would cause fatal errors for every message creation. To do what I was saying, you'd have to delete a row from the database int he table content_type_field. Then clear the contentTypes cache from the data registry. I honestly wouldn't recommend doing it if you aren't very familiar with doing things like this already. I'll attempt to make the option to disable searching from my add on in the next couple of days. I had a new release for Conversation Essentials that I wanted to push out a few days ago anyways, just been really busy.