Highlight samples in Kindle Device view

This is my first post! Hi Moblereaders.

When viewing the books on my kindle device (from inside Calibre), is there anyway to have Amazon Sample books highlighted somehow highlighted in calibre?

I find myself accidentally copying (and de-drm'ing) samples over from the Kindle and cluttering up my library.

I know is says "Tags: Sample Book" if I click on an individual books, but it would be nice to quickly see what books are samples from the list.

Thanks.