I actually thought about this a bit, and I don't think I saw it discussed, but what about in the event of instrumentals? Obviously, all of the rating comes from lyrics, so a song without any singing or spoken word or anything, automatically FF. However, there's a few songs where I think that it's a bit iffy, and wanted to get some insight on. These are songs that I picked and we charted, and there's more examples, but these are the ones that came to mind first.
Carnivore - Five Billion Dead
Testament - Urotsukidoji
Tomoyasu Hotei - Kill the Target
I could be overthinking this, but I wasn't 100% sure and figured it'd make sense to ask. For the first and last of those, they both have references to people dying, or killing someone, do the titles alone bump up the rating to SR? And for the middle one, it samples some *questionable* source material, and I wouldn't want any kids looking it up, and finding something fucked up, you know? Or for every case, does them being instrumentals supersede that and make them FF still?
To my knowledge, unless the title of the song is too risque for a Family Friendly rating, all tracks with no vocals would be Family Friendly. Even if the song sounds tough or evil.