I think a better example of movies which "wouldn't be allowed today" is probably something like the Hangover, which just mines outdated stereotypes & slurs for laughs. Just a sign of society moving on really (as much as Todd Phillips likes to cry about it, I feel his inability to adapt to the comedy landscape is really just a failure of the imagination). I thought the 21 / 22 Jump Street movie addressed this issue quite well it seems the shift took place sometime between the two releases