Does this FMLA loophole give employees unlimited leave?

Q: “FMLA entitles qualified employees to 12 weeks of leave per year, but for an hourly staff member who wants to use intermittent FMLA, do we simply track the exact hours each day during the year she is off work, and once those hours add up to a 12-week total, it ends? If so, this means someone could be out for a whole year, every year..?” – Kary, Maryland