Is it permissible to work in an internet café where some customers access pornographic websites and others containing illicit material such as music, even if limited to offering advice to change this wrongdoing?

It is forbidden to work in an internet café or to participate in its opening if you are unable to change the evil within it, due to the assistance it provides in committing wrongdoings and the spread of indecencies. However, if you are able to change the evil and set controls, then there is no harm in that.