I see what you are saying now. I thought you were talking about the error message that shows up next to a field when spry effects exist (which they appear to do when validation occurs when using Form Builder) and can be modified by the developer to show a message.
What it sounds like you are saying is that text could be typed on the page (anywhere on the page for that matter) and when associating a Validation Show If behavior to it, it will appear when the validation fails. It would make sense to put the text next to the field since we are doing server validations for that field, but the text could be placed anywhere if we wanted.