I wouldn't think anything of it to start with because I wouldn't remember year to year who was home and who was not
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If it bothers you that much consider they only have a handful of years to take their kids trick or treating before they will want to go on their own or are too old to go and they will have 50+ years to hand out candy after that.

If it bothers you that much consider they only have a handful of years to take their kids trick or treating before they will want to go on their own or are too old to go and they will have 50+ years to hand out candy after that.