On topic, I think that some film makers do successfully use crapness to comment on certain issues sometimes. My first example would probably be Verhoeven's 'Starship Troopers', which, I would say, uses crapness to attempt to alienate us from the human characters and make us more sympathetic to the bugs.
I wouldn't say it was crapness, he used an element of gung ho cheesiness to create a satire.