This is not permissible as it involves lying and cheating! Change your idea with something beneficial for the community also.
Read more
This is not ok. She must stay away from that as there are many brothers ma sha Allah who give lectures, conferences and so on. She may work in dawah in other forms and only with sisters. Her voice can trigger fitnah in the hearts of sick people.
Read more
Every Muslim must give dawah. However, there must be no mingling with the opposite gender and this goes for men, too.
Read more
Tell him that there a lot of people who used to do what he is doing and they ended up afflicted by evil eye that crippled them or made them look bad.
Read more