I believe these questions are on-topic. They are, after all, obviously aviation-related, and I think they'd be of interest to enthusiasts and professional pilots alike.
Of course, just because they're on the subject matter doesn't automatically make them "on-topic" per Stack Exchange standards; however I believe this is what Community Wiki is all about!
Related: What are "Community Wiki" posts?
I'd also agree with the others that limiting the scope (especially on the movies question) would be beneficial.
Addressing the points that @derobert raised:
People add new answers (instead of editing the existing answer). May take a lot of moderator attention clean all these up.
I think most people will be inclined to "add their input" to the main list, and I don't really think it'd take much moderating.
The amount of activity on list questions often pushes them to the front page.
Initially, perhaps, but there are only a finite number of TV shows and movies.
Or to the popular questions (network-wide) feed. Or to Twitter. Various blogs & discussion sites love these types of questions, and will drive a lot of traffic to them.
Fantastic! That's what we want!
That sounds good, but ultimately makes the rep-gain & many answers problems much worse.
There's no rep to be gained from Community Wiki posts.