To tell or not to tell

My neighbors to the left of us are miserable people. They do not enjoy life and everything seems to be in the box - no coloring out of the lines and no cookies after bedtime (maybe this is common for all people but I like to eat cookies at all the wrong times and all the right times).
We are super friendly. In case you dont know I live with 3 other incredible girls. I'd say we are all pretty decent and have done nothing to offend them. Or so we thought, after our second party of our tenure here last July, Kat (who was only 5 days old to the house) got a lecturing from Mr. Grinch next door. He claimed at the time that he hears us everyday talking on our cell phones outside. (Okay, I may have been the culprit for this as this summer I had a thing for Texas and people, namely boys, in Texas and I probably talked on the phone a bit overboard. Still, maybe they heard a conversation or 2 - no reason to hate.)
Anyway, the 2nd annual Twice Yearly Terrace Christmas Throwdown is upon us and to be honest - we are scared silly. No, not about the party, the masses of people and then random people that those masses bring, not about the lack of space, parking, eggnog,food, girls, beer or any of the sort but of the neighbors! All of our other neighbors think we are the coolest thing since sliced bread and they can't wait for the 'little' shin-dig. They all show up and love to mingle and see the activity of the young Atlanta crowd. But our Grinch neighbors (God Bless them) won't even acknowledge us when we walk outside. Often, I will say an obnoxious hello just to make them have to respond to me.
So the question is....Now T-44 hours.....Do we tell them that a few peeps may be stopping by Saturday night for a little Christmas cheer? We tell them, they just call the police and us before hand or (as mama once taught) do we just ask for forgiveness rather than permission -the next day? I need your thoughts. I respect your opinion and need your help.
We thought about just paying to send them to the Hilton. Or should we walk over in person with cookies? They already told us last party that they didn't appreciate that we invited them too....their lives didn't have time for our nonsense.

The party is not nonsense. It is the the grandest form of fellowship that you may only want to be a part of once a year - but you don't want to miss it nonetheless.

And I will tell you this...We have another surprise...................

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PICTURE MAN! You got it, ZAPS, BOPS, whatever you want to call him. He'll be here - later in the evening. Take advantage for sure.
Merry Christmas!