Kids running down hall way screaming at hotel

Staying at a Fairfield Inn all week while visiting family. Small kids about 3 years old began running and screaming in hall way about 8 AM. Apparently a group of families with young kids are all staying on this floor. About 9AM one of the dads started chasing them playfully and yelling like a bear or something. I was fully awake, but it was beyond the point of being inconsiderate. I opened my door along with several other people on the hall to see what was going on. My 23 year old son opened his door and politely asked if they could keep it quieter since some people were still asleep. The dude, who looks like the type of guy that wears shirts that say “Affliction”, said something back but I didn’t pay attention. I assumed the man apologized and went on about my business to get coffee in the lobby. Turns out he told my son that maybe they shouldn’t sleep so late and accused him of waking them up at 11:30 PM. The fire department was called last night due to a guest medical emergency at 11:30 PM, but we had nothing to do with it. Kids are still playing in hall way even after someone complained to the staff. Families all look clean cut, totally unexpected response. What is wrong with people?