"Stultus Saxum" seems to be used as a noun to denote a "common troll" on the Internet sometimes. I have found that it does translate to "foolish rock" or something in Latin, but I think what it really means is that "A fool who throws stones at other people", which would make perfect sense, and could describe the majority of the commentators on YouTube.
I chose that username with a tongue in my cheek, mostly.
I haven't been posting here very often, mostly because I'm actually a bit obsessed with creating (original) music on Mario Paint Composer (with a "Hard Rock" soundfont which makes the instruments sound a lot more like high-quality MIDI than some old SNES game) for my own personal amusement.