Is your feature request related to a problem? Please describe.
I'm always frustrated when I use sp_BlitzIndex to check out a new database, but it doesn't warn me that somebody has persisted statistics sample rates.

Describe the solution you'd like
We already warn about low sample rates, so I imagine that this is just a simple matter of adding a check of the same priority with slightly different text.

Describe alternatives you've considered
I wonder if this merits a place in sp_Blitz.

Are you ready to build the code for the feature?
Yeah. It sounds easy.