what is proper etiquette for telling someone their kids suck?

Our plethora of children will be at our wedding. Its a laid back affair and they don't have to pose for a bunch of pictures. There is plenty of room to run and dance. I'm sure they will be a little squirrely because of all the hoopla, but we have lots of family to help out in tending our flock. We also have our Iowa girls coming specifically to help parent our offspring so that we are free to focus on reveling in our love fest.

I am concerned that other reproductive guests may not be this considerate. Ok, just one guest.

Kids are welcome. This is not a haughty affair. But I don't want a specific guest to leave her bratty children unattended during the festivities. Well, I don't want anyone's children to be bratty or unsupervised, but I'm focusing on one nearly surething for now. This guest is known for not tending to her kids, and they are NOT well behaved. Her children have already had run ins with my children at other functions. Miah and Trin heard the RSVP at school "They are coming with their mom to your wedding. What are we going to do!?!?!"

I could rant about these kids and their foul mouths, snotty attitudes and disruptive reputations, but I won't (ok, i am aware i did). Instead I need a gameplan.

1) Indicate no children on this guests invitation (even though other children are invited.)
2) Indicate child care not provided (but she thinks clearly thinks her children do not need supervision)
3) Talk to this friend about my concerns saying "I really hope people will mind their children. There will be adult beverages and hunting gear and a pond where they could disappear and drown...." *hint hint
4) Provide child leashes as party favors?
5) Kiddie corral??