When I was a child I asked my mother what homosexuality was about and she said - and this was 100 years ago in Germany and she was very open-minded - 'It's like hair color. It's nothing. Some people are blond and some people have dark hair. It's not a subject.' This was a very healthy attitude.
It is not unprofessional to give free legal advice but advertising that the first visit will be free is a bit like a fox telling chickens he will not bite them until they cross the threshold of the hen house.