Goldie,
Aryeh actually didn’t ask us if the Rabbi was “wrong”. In reading Aryeh’s post and comment, he appears to be a really respectful individual, without the need to pass judgment on others. He asked,
“I have little experience with larger shuls and don’t know what the general practice is concerning small children during davening, but was wondering, since it is the rabbi, and there is no polite way to ask him to reconsider bringing the child, and he might be doing it for practical reasons, e.g. no one to watch the child during those times, what is the feeling of wearing earplugs?”
As you and I are likely in very different age brackets (it’s wonderful to be young, please don’t take offense!), our understanding of the issue I referenced may differ considerably, as is often the case with such disparities.