Reminds me of when I was younger and my mom and my brother were using a windows computer. They got the message “an illegal error has occurred” and my mom called me to ask if they had broken the law.
sometimes people also complain about xscreensaver's lock screen because it doesn't use a widget library, but the alternative lock screens can often be crashed through bugs in the widget libraries they use
When I was young I had messed with the computer and it showed an english message with the word "atom" in it. My mom not being a native speaker freaked out as if a nuclear explosion was about to take place.
I don't really think this is a security issue. If an attacker is able to try executing sudo on your system, you have much bigger problems (for example, data exfil can be done by non-sudo users in many cases, or if your system is sufficiently old there's known priviledge escalation exploits). I don't think an attacker gains much knowledge from knowing whether or not they're on the naughty list.
If the attacker can execute sudo they can probably just alias it to a sudo that sends them the password and wait. The number of users on multiuser systems who don't have sudo access is just vanishingly small. Universities perhaps. But in most companies, if they trust you with access to the machine in the first place they'll trust you with sudo access.
If you shouldn't be using sudo, then you shouldn't be listed as a sudoer on that system. If you're listed as a sudoer, then you should become familiar with what sudo does.
i'd argue in a different direction: if sudo barks a scary unknown message at me, i'd avoid using it altogether and just use su, which is the opposite of what people should be nudged to do.
Yes. Largely through torturing my system and reducing it to non-bootable state and having to read up on what symbols I mangled this time and how. Why do you ask?
and it's only been the same since people started to switch to sudo in the late 90s; su never printed such a warning