Listing an offered (but not taken up) position on CV I was offered a lecturer (assistant professor) position which I decided for personal/professional reasons not to take up. I therefore remain currently a postdoc. I have seen people listing such offers on their CV, with the addendum "not taken up". I guess the rationale is to convey the message to future prospective employers that "someone already deemed me good enough for this kind of job".

I was wondering if while I am a postdoc it is a good idea to list said lecturer offer on my CV, and if so, whether I should drop it once I manage to secure a lecturer (or equivalent) position elsewhere.
Personally, I wouldn't list jobs I hadn't taken up on my CV. Whilst it could give a prospective future employer confidence that you would be up to the job, I feel for me I would rather discuss this face to face in an interview where they can hear you out rather than let them make unnecessary and potentially false assumptions about you based on your CV alone.