Hi soliek.
I think the bans are good and need to be done to preserve the level of that community.
On the tail end of Chanukah, it has to reiterated that one of the messages of Chanukah is true. Being influenced by the mindset of “Yavonim” who create these books and movies, etc., influence us in a negative way.
Being a bt guy, I have to tell you that indulging in such things like movies or books by certain non-Jewish authors/poets, does set me back from the mindset I am trying to build in my efforts to come closer to Hashem.
Now, if someone is caught violating a ban, how should they be dealt with? That is another problem.