what about doing something like "any guests of members planning on attending a guild meeting or event needs to have informed the guild a minimum of "X" days/week in advance". That way, it isn't used as a last minute baby-sitting scenario, and will still allow members to bring truly interested people/children along. When they call in to "inform", at that time they can be told, in private, they are certainly allowed, but will need to be respectful with regard to noise. Then they can also be told, not all conversations at an adult meeting are meant to be overheard by little ears, and that it is not up to the guild to curb any conversations to be geared around small kids. That way the person bring the child knows there may be adult language, and etiquette is expected.
Just my .02.
I can see both sides of the spectrum here
