Yeah, anyone can cut someone’s hair just owning a scissors and nothing else and there isn’t anything illegal about it. Now if they advertise that they have an in-home salon yet are not licensed, someone could report them (maybe to the health department?) and maybe they’d get a fine. Even people who do nails. To paint nails you don’t need any certification, but if you file the nails you do. Crazy but true. A tattoo artist working out of his garage would be reported to the health department as well and could probably face a much larger fine because that act can allow transmission of blood-borne diseases.
Heck, I have cut some friends’ hair before (no charge of course) and did a decent job, but I used a sewing scissors and they sat in the kitchen. Lol. I didn’t go post on Facebook “Hey friends! If you want a $5 haircut in my kitchen, line right up! I did a good job on this girl, that guarantees I’ll do a good job on your hair too!”
Of course this is all getting away from photography. You don’t need a health department license to take someone’s pictures and you can’t get a fine for doing so. If they get reported for tax evasion they’d have to be investigated and potentially face fines or have to pay in to the IRS.