How about a love of dance or photography?
We go to work to get paid for our skills, not to go camping together or share our love of bird watching.
What if a hobby included volunteering at a church, mosque, local GOP or DNC fundraising HQ, re-enacting War simulations or practicing at a gun range?
I agree with the posters above who think this is, at best, useless and at worst, a potential for discrimination.