Learned a new word today: skulduggery. Thank you.
Etymologists aren't sure exactly how the word arrived in English, but they do not believe it has anything to do with skulls. It is possibly derived from the now-very-rare "sculduddery," a term once used to refer to gross or lewd conduct, but unfortunately the origins of that word are also unknown.
https://www.merriam-webster.com/dictionary/skulduggery
https://www.dictionary.com/browse/skullduggery
https://www.merriam-webster.com/dictionary/skulduggery
https://dictionary.cambridge.org/us/dictionary/english/skulduggery
So the warning signals in our CT are close to being criminal?