Here is the top 5 films which got the most complains, its interesting to see that in the UK most complaints are based around violence in movies.
The Todd Phillips directed critically praised movie starring Joaquin Phoenix in the lead role which also won him the best actor Oscar got 20 complaints.
The movie was given a 15 certificate and according to the BBFC most of the commnets were for the violence and tone, with a small number of people asking for the movie to be banned outright.
Another critical darling and Oscar winning movie most notably for Olivia Colman in the lead role and was given a 15 age rating.
The movie got 12 complaints mainly for the strong language and sex references and acts, although as the BBFC notes most of this is done in a comic association.
Given a 15 certificate the Keanu Reeves movie is a full on tour de force and the 9 complains were about the level of the blood violence.
Interesting the BBFC notes 'Our research shows that violence that is perceived to be 'real' registers more strongly with viewers than violence that is clearly stylised or fantastical.'
Robert Rodriguez directed this critically acclaimed comic book adaptation which was given a 12A age rating on release, the movie got 5 complaints for its strong language and violence.
The British made movie which starred Dwayne Johnsson and was directed by Stephen Merchant for 5 complaints about the movies language and sex references.
Of interest is the Transformers spin off movie Bumblebee which was submitted to the BBFC in 2 different edits, one was passed 12A and the other PG, only the PG version was shown in cinemas and the film still got 4 complaints about the violence although its purely fantastical robots that are creating the violence and no humans are ever involved.
The report is a fascinating read and can be downloaded here.