Kelsey Grammer's 4-month-old baby doesn't just party at the Playboy mansion ... she also dangerously rides in vehicles WITHOUT A CAR SEAT ... and it was all caught on tape.
Kelsey and his wife Kayte arrived at LAX yesterday with their adorable (and fragile) baby daughter Faith ... when they were met by a waiting chauffeured SUV.
But as Kayte was about to enter the car with the kid, she realized there was no car seat in the SUV ... but she got in the car with the baby anyway.
Kayte seatbelted herself in the car, and with the baby cradled against her chest, the car took off ... a clear violation of the California car seat law.
We're assuming the baby made it home unfazed .... but according to various safety organizations, it's a STUPID risk to transport your newborn without a proper child safety seat ... considering car seats can significantly reduce the risk of injury in an accident.
Of course, Britney Spears took all sorts of heat when she drove around with her baby in her LAP several years ago.
Kelsey's rep, Stan Rosenfield, insists there was a car seat inside the vehicle ... though there's no evidence of that in the video.
This comes shortly after Kelsey received a ton of criticism for taking little Faith Evangeline to a party at the Playboy Mansion. He defended his decision on that move this way:
Kayte is breast-feeding and we do not have a nanny or a trusted babysitter at this time, so Faith goes everywhere with us. We enjoyed the party with a few of our friends, the baby slept as her ears were covered the entire time and we left shortly after midnight