It doesn’t get any better when a few lines further down he disables the LaunchServices quarantine and frames it as eliminating a dialogue box instead of as eliminating a major mitigation to browser vulnerabilities.

(a fun game whenever these silly scripts get posted is to count how many different security measures they silently disable with little to no warning to the naive)

Can you elaborate? I despise the startup chime and disable it on all of my Macs. Why should they announce a startup when none of my other devices do? Why would I want to wake a sleeping baby or annoy other library patrons? This is one of the most obnoxious decisions Apple ever forced on its users (and, yes, I was happy when the illuminated logo on the laptop lid was finally put to rest).

Yes! The startup sound is part of the long history of the Mac. It’s entirely nostalgic for me and always reminds me of the sense of wonder I felt when I first used a 128K Mac.

Turning startup sounds off is definitely the sensible default for laptops.