Up until last year, I gave out fun-sized candy bars. Two per kid. I usually handed them out myself because the process bogs down if the kids are allowed to choose. I have to keep the group moving in my neighborhood - way too many trick-or-treaters. Then when I got tired, I just dumped the rest into a few kids' bags and turned the light off.
Older kids: Man - I don't care if they come by - I don't need to be the grinch about teenagers wanting to have candy. I don't really understand why there needs to be some weird arbitrary cut off where some kid is too old to have fun on Hallowe'en. If they're young enough to have fun trick-or-treating, then they're young enough for an F-ing candy bar.
But last year, we decided to spare the cats the trauma of the contrantly ringing doorbell (in their worst nightmares, the UPS man comes inside and beats them, I think). We turned off all the lights and watched movies in the basement. Best Hallowe'en ever.
I had to hand out granola bars to a couple of kids though - our nephews stopped by, and I guess some neighbors figured we were open for business, since they saw some kids at our house.