Thanks for clearing that up epcotfan. Seems to me, that all families are welcome in the hot tub. These are the rules posted at Coronado Springs in case anyone hasn't seen epcotfan's link:
In case of emergency, dial 911.
No food, drink, glass or animals in pool or on pool deck.
Bathing load: 22 persons.
Spa hours: 8am - Midnight.
Shower before entering.
Maximum use: 15 minutes.
Maximum water tempreature: 104 degrees.
Children under 12 must have adult supervision.
Pregnant women, small children, people with health problems and people using alcohol, narcotics or other drugs that cause drowsiness should not use spa pools without first consulting a doctor.
For safety, diaper age children must wear plastic pants or swim diapers.
Clearly the snorkler and his mom were breaking the rules

, so were the little kids cherry bombing into the water with no adult supervision. Clearly families that have young children who want to use the hot tubs, are not breaking the rules; they have every right to do so, as stated by WDW's rules.
I'm surprised to see that there are no rules that say: no swimming, no diving, etc. I really am. Maybe there are smaller signs posted nearby????