Board Thread:Episode Discussions/@comment-25319479-20160901110335/@comment-1251315-20160902095544

Starscream1998 wrote: That was so stupid, why didn't they show that? Because it is inappropriate for being broadcast on television. Which is why the highest "swear word" word used in the dubs is only "bastard". Some fansubs use much more inappropriate language than is used even by Crunchyroll's subbed version.

It's the same reason why the anime doesn't show Shikamaru starting Asuma's habit of smoking, since it would be seen as inappropriate and suggesting that it's fine to smoke, when it's not.

Simply put, they don't want to be seen as teaching younger people bad habits (much of the series can be watched with Parental Guidance or by 12-year olds) or to risk a possible fine by any film/television censors in countries.