Creating editable BO column without a DB backing

Is it possible to create a Scripted BO column which isn't tied to a DB field ? Basically I want to have an editable checkbox on a scripted BO grid, and on Commit() if that checkbox is selected I'll do some custom stuff.

Is that possible or does every scripted BO field have to be connected to a database column ? I already noticed that calculated fields show up as read only but maybe I'm missing something ?