As long as the baby has ear protection, it's not going to traumatize them. Mark Coleman's kids were at the wrong age to see Daddy get his ass kicked, IMO, but they're his daughter's.
Just to soapbox for a minute, if you have little kids you shoud always be able to provide hearing protection in loud environments. Those little disposable foam plugs in your pocket can come in really handy. Ever wonder why kids fall asleep at loud events sometimes? Kids shut down when they're overstimulated by audio overload. And sustained high volume(+30 min.) can do damage to hearing. Take care of kids ears. Thanks, end of rant.