If you turn off SIP, you can run unsigned kernel extensions without issue, both on a Hackintosh and on a real Mac†.
If you're a Hackintosh user, but for some strange reason you want to leave SIP enabled, you can inject unsigned kernel extensions via the Clover bootloader. (I think you may need to temporarily disable SIP during setup or something like that, I don't fully remember. I just turn SIP off.)
† I actually find this much easier than Windows, which is a royal pain in the neck if you want to install unsigned drivers.
As I see it, if you're the kind of user who's installing Hackintosh, you're also probably savvy enough to not grant root permission to just any software. I want to have full control over my computer.