I don't take kids, either, especially babies...no way Jose, not any day! I never wanted to be around babies when I was a kid, nor as an adult and I never had any myself...no regrets...but that's me. So, I don't want them here either. We have a lot of very expensive equipment here that most kids just wouldn't comprehend. For example, the toilets are over $1,000 each. Break that and you will wish you were dead.
Kids like to put marbles down the toilet because they think it makes a neat sound. Put marbles in your garbage disposal, and you'll get the picture.
Kids also like to push buttons and pull levers when no one's looking, after they've been told not to touch it. If someone pulls the Halon lever which is for use only during a fire, to be pulled by the last man out, you can instantly kill the occupants who may be in any of those engine compartments - those persons who might be in there would only be crew - that means ME.
So, anyone can blast me all they want for telling them that their kids are not welcome here, and it won't bother me at all. What I tell folks is that we are not equipped from a US Coast Guard aspect to accept kids (meaning I don't have kid-sized life vests and other similar safety equipment), and that's why we don't. Perhaps that sounds more like I'm concerned about the safety of their children rather than what their children might do to my property. The real reason I won't outfit the boat with kid sized stuff is as I mentioned above.