It was a random sampling of songs that I was already playing while I was writing that. All my music is either folk (with a lot of Irish and American folk), rock, or indie. If you like though, you could try it yourself.

The great (or perhaps, not, depending on what you want) thing about the Flickr search is that it picks from a set of curated photos, so it's highly unlikely you'll get an unpleasant one. However since it is picking random pictures from the internet, don't run it where you'd get into trouble if something inappropriate does manage to come up.

I'll file that under "user error" :)