Mr. Smith Goes to Washington

So, last night my wife and I watched the movie "Mr. Smith Goes to Washington." The most scandalous part in the whole movie is probably either when the senator's daughter comes into a scene with a sleeveless, spaghetti-strap dress on or scenes showing some characters drinking alcohol. That was the worst!
I couldn't help but think, "What has happened to our standards?" This movie was made in 1939 and is so much cleaner than even some PG movies today. It was not rated. According to Wikipedia standardized ratings weren't used until the late 1960's (probably because there weren't movies bad enough much earlier than that), but a little earlier than that some local governments tried to ban certain movies with something similar to a rating system. Interesting.