If your guests are going to be rude and bring uninvited people with them to the reception, then I think a B&G would absolutely be within their right to ask them (politely) to go home. As other posters have indicated, if you word your invites correctly and it's clear who is invited, why should you be obligated to cover the additional expenses incurred by the extra headcount? I'm curious if we were talking about a guest bringing a +1 who wasn't invited vs a child, does that make a difference? In my opinion, no. It's rude to bring someone (child or adult) who was not invited and it's disrespectful to the couple.
We have the same potential issue - people have been specifically told, on several occasions throughout our engagement, that our wedding is 21 and over and yet I've heard of some folks essentially "threatening" to bring their kid. I have no problem asking them to leave, especially because I will not be held liable for an underage, uninvited guest drinking alcohol (not having a bartender).
Re: What do I do if guests bring kids to a kid-free wedding?
On the other hand, FI's cousin H has a 4-year-old daughter A. A is very well behaved, and I like H a lot. If H brings A, I will not throw them out, because H is a responsible adult and will watch A and make sure she's being good.
In the OP's situation, it sounds to me like the damage is already done. By phrasing the invites in that way, people were offended, and now they're ignoring the request because they're hurt by it and want to "get back" at the "crazy bride who made her FI ignore family rules"
There are people who would suck it up and accept the kids, but iif it really isn't possible to accommodate uninvited kids for whatever reason, including a no-kids policy by the venue, then the couple has no choice but to ask the guests to leave with their children. If they are planning a no-kids wedding, nothing in etiquette requires that they plan to allow people who bring their kids anyway to stay.
The parents who assume their kids are invited and ignore the fact that their kids' names aren't on the invitation, or even who are told to their faces that the kids are not invited, and bring them anyway expecting them to be accommodated, are the ones being rude and risking their friendship with the couple-not the other way around. Telling them to leave is merely the consequences they need to accept for their own acts of rudeness and is not impolite in and of itself.
There are people who would suck it up and accept the kids, but iif it really isn't possible to accommodate uninvited kids for whatever reason, including a no-kids policy by the venue, then the couple has no choice but to ask the guests to leave with their children. If they are planning a no-kids wedding, nothing in etiquette requires that they plan to allow people who bring their kids anyway to stay.
The parents who assume their kids are invited and ignore the fact that their kids' names aren't on the invitation, or even who are told to their faces that the kids are not invited, and bring them anyway expecting them to be accommodated, are the ones being rude and risking their friendship with the couple-not the other way around. Telling them to leave is merely the consequences they need to accept for their own acts of rudeness and is not impolite in and of itself.
I didn't say it was rude to kick them out. I said I wouldn't do it because the fallout wouldn't be worth it.
Everyone's kids are invited to my wedding but if they weren't and someone brought them anyway, I wouldn't make a big deal about it. I know there are people who would but it wouldn't be a hill to die on for me. Then again, it is really easy for me to say that because my venue is a family member's property so adding seats, ect wouldn't be that much of a hassle. If I was having it some place, like a country club or something, where uninvited guest would be a huge hassle I might feel differently..
There's a difference between "someone just bringing their uninvited kids" and "someone bringing their uninvited kids, even though they have repeatedly asked the bride and groom, and have been repeatedly told that the kids are not welcome there." The first one could just be incompetance - the guest not knowing proper etiquette or making assumptions about the invite. The second shows a willful and intentional action to disrespect the bride and groom on their wedding day.
If the first one happened to me, i'd get over it. If the second one did, I'd absolutely have my planner ask the people in question to leave and only return when they have found acceptable accommodations for their children for the duration of the reception.