My rule is this, if you are a child and you are rude to me, you gaurantee yourself no chance to one of my children's parties. My house, my rule. I do not reward being rude to an adult with an invitation to a party. If I do not know you before the party, you will not be invited.
Sorry, I need to know you before I invite you. I've dealt with rude children twice at the only two parties I had for my youngest DD......the first, they (rude children) got over on me. Second, I got them back as they weren't invited. They got turned away at my front door.
My entire steet has an over-abundance af children of all ages, and whenever there is a birthday party for any child(ren), all of the children living on my street + whomever else is visiting will show up and none are turned away. Quite a few of these children are rude, so, at my house, my rule applies. Most people brush the rudeness aside because it's a party, including my family, but I do not. If any of my children were ever rude (I know 3 could), and they were turned away for that reason, I'd tell them to suffer the consequences of being rude.
I live on a limited budget and can only afford a small amount for a party, so if you are invited to a party at my house, your parents will know the day ahead, and you will know (children can't keep secrets) the day of the party. I will know who can/can't show up. I let each parent know that if their child can't make the party, please don't suddenly show up as the child will be turned way at the door, since I will only have enough food for whomever told me they were going to be there.