As someone who uses systemd, "boot security" is pointless. If someone has enough access to your hardware to try booting a different kernel, they have time to load a signed shim that passes secure boot and launches unsigned code.
The only boot security real users need is disk encryption.
Isopropanol is relatively safe to drink in small amounts (single digit mL). It's only about 2x stronger than ethanol, and your liver metabolizes it to acetone, which is safe.
Denatured alcohol contains methanol, which is way more dangerous since you metabolise it to formaldehyde.
Source: I unknowingly got drunk on IPA fumes before work one time and wrote some really bad code
The only boot security real users need is disk encryption.