Good question, though completely hypothetical as I don't have DC.
Probably not is the answer.
Its hard to say, all my xl bully type owning friends are also dog professionals. I think most would say no anyway, their dogs do not live with children and whilst they may be familiar with children in some circumstances (say out for a walk in the park) they are not used to having kids in their home.
One has got kids, 16 and up, she didn't rescue an XL bully until the youngest hit 14 (wasn't described as an XL bully at the time, was just a 'bull breed x puppy'), but again, only her kids mix freely with her dog, and still are not left unsupervised. Visiting teenagers do not meet the dog, ever. So yeah I would probably let a child go to her home, if it were necessary, as I know there are two closed doors between strangers and dog at all times.
Certainly from my POV - I don't have kids in my house. My dogs are friendly (not xl bullies), but one is liable to knock a child over (he can knock an unsuspecting adult over, as although short, he is hefty and 'trip overable' height), and all three are unused to children in their home.
They are not bothered by kids outside, don't approach, just trundle on by, but anyone IN the house is a visitor and thus exciting. I love my dogs, it isn't worth the risk, however small that risk might be.
I would not let kids go to someones home where the owner is not a dog professional, at all. I have seen too many horrific things.
I would also not let a kid go to someones home where they use aversive training methods, no matter what breed or size of dog. Such methods have a far higher likelyhood of causing aggression, particularly towards strangers and particularly towards children.
And I would not let a child go to the home of anyone who trains their dogs in protection work/schutzhund. No matter what methods they used (though none of my friends who do force free ringsport would have a kid in the house with the dogs anyway).