First, let me just point out to one reviewer (bop pop, or something like that) that Fitzwilly is NOT a Disney film, so if you find it immoral, well, don't blame them.
Secondly, it IS just a movie, and considering some of the horrible junk that has been brought out by Hollywood over the years- some of which was intended for children, some not- it's hard to even think of this charming, little film as immoral, disgusting or anything else.
I initially sought out this movie- and bought it before seeing it- simply because I'm a huge "Get Smart" fan, and therefore, adore Barbara Feldon. I've read a few of the male reviewers saying they had big crushes on her. I didn't get to witness this miracle comedy until my late teens during the early 90s when Nick @ Nite began showing it, but as a young woman, Barbara Feldon became an iconic role model to me- and to many others I know.
After viewing this movie, I was thankfully not disappointed, which sometimes can happen when you watch or buy a film simply because someone you like from another show is in it. Dick Van Dyke and Barbara Feldon had wonderful chemistry. There were also quite a few supporting roles played by sometimes veteran character actors and some just starting out (including a very young Sam Waterston- before his incredible "Law & Order" days).
The humor was witty and sweet, and the premise was (and I think most people should know this) not to be taken seriously. I think we all know it's wrong to steal or to lie or to break the law, but there are quite a few films that create heroes out of anti-heroes and most people aren't complaining about them. (For instances here are a few I pulled off the top of my head- "Chicago", where the main characters are murderers, dishonest lawyers and bribe taking wardens; "Thelma & Louise", where two women start out on a fun trip, but through unfortunate circumstances, become outlaws on the run; and even "Pirates of the Caribbean", where the audience is rooting for Jack Sparrow, a fun-loving guy with a good heart, but who is, after all, still a pirate.) Some have said this is a children's movie. I certainly think it's safe for a child to watch it, but sometimes the subtle humor might go over their heads. I think it's just a fun, lovely movie, with wonderful actors, having a good laugh, and creating an enjoyable couple of hours.