A difficult subject, a good fe years ago I was on a charter from LGW to Faro on a no longer around airline 737-200. Sat by front of wing and no leading edge slats were deployed during taxy- we sat at the holding point for about ten minutes due to traffic and still no slats. Me my family and our friends aboard, do you say something or not . Most airlines I had flown with deploy slats after push back or during taxi. I decided that if we pulled onto the runway I would do something (not quite sure what) but this was pre locked FD doors. As it happened as it pulled forward out came the slats. Was it their procedure-had they made previous attempts to deploy and decided on one last go before return to stand or did they forget until last moment- who knows but it is not a dilemma I would want again.
What would the crew do If I went up to an FA and said there are no slats extended?