http://forums.dds6qkxpwdeubwucdiaord2xgbbeyds25rbsgr73tbfpqpt4a6vjwsyd.onion/t/eliminate-ld-preload-and-other-dangerous-environment-variables/10594
Maybe one of multiple of the following programs such as systemd, systemd user sessions, X login sessions, wayland sessions, getty, xfce4-terminal emulator, bash, etc. should have an option (set by --parameter or environment variable) no-unsafe-environment-variables or so which would then prohibit setting dangerous environment variables such as LD_PRELOAD ?