segment size

Set up a dashboard rule to disallow data segments that are too small. I like the fact that I can select segments and even combine them (eg with slicers). But, I would like to disallow selections that would leave me with a segment of less than, eg. 7 records/tuples. This is both to ensure (some) validity and (a great deal of) anonymity when it comes to personal data. Can this be done - eg. with an 'alerts' box, when a (combined) selection would return to few records?