I was a kid who went to other neighborhoods to trick or treat. I know. The shame. The horror. I grew up in apartments, no one handed out candy really. So I'd head off to one of my friends' houses, in the nice neighborhoods, and go begging for candy door to door. It was tons of fun, I don't have siblings so I got to go around with my friends and then we'd go back to their house, get our candy checked (razor blades and such), and then start swapping until we had just what we liked.
As an adult I love to hand out candy. I love seeing the kids costumes, and even meeting people who live around us. Of course we live in a townhouse community so we don't get a lot of ToTing so we've gone to friends houses to pass out candy before. I do give more candy for more creative costumes (zombie fairy princess got a huge handful last year, huge), and saying please/thank you/trick or treat (as long as old enough to do so) can also result in more candy (even a vague attempt, or polite smile if child is shy/developmentally challenged results in more candy).
I do say just as soon as we become wealthy we'll start passing out full sized candy bars. And I don't care which neighborhood you're from.
As for the guest list...that sounds excruciatingly complicated. Does the kid give you there name day of? What if someone who isn't in the neighborhood still gets on the guest list? I mean the signs are posted in public places. Do the parents have to show proof of residency?
Oh, we do make one distinction. When little little ones come to the door, like not even 2, we give them these little coloring books over candy (usually the parents are just bringing them by to show off their cuteness or with an older sibling). And there is one girl in community that has several food issues, so while her parents take her around, she doesn't get to enjoy the majority of her candy (she brings it to her parents' work and hands it out to the people who work there), so she gets a coloring book too (and some candy, her parents have said she loves handing out to their co-workers).