Always seems to me like the majority of CW and First travellers didn't pay for the tickets out of their own pockets.

So what's the big deal if there are noisy kids in the cabin, if one is flying on the company's dime ?
It's not like you paid for the seat .

The earplugs provided by BA are pretty good actually, I don't see how noise can be an issue when you use those.
People using those noise-leaking earbuds (anywhere) and cell phones in the lounge are much more of a bother to me .

As for kids, personally I love them, understand how a toddler can be shouty at times, and I can live with it, force of nature etc..
A seven-ish year old is a different matter, I believe the parents are responsible in this case, and the crew should step in if the parents fail.