This whole anti-hipster sentiment is so bizarre to me. It's all about policing other peoples' fashion/taste/activities without reason. The idea that hipsters are somehow not genuine doesn't make any sense. What is there to be genuine to?
If you use an old film camera because you like the photos it takes and are fascinated by how it operates, more power to you.
If you use an old film camera because you think it looks cool around your neck, more power to you.
If you use an old film camera because you like the fact that you're one of the only people using one, more power to you.