I bring the tot to the mall at like 4pm to do rounds (or just sit around and look at the costumes), then we go home...
If I don't go out I generally do the same old same old... I turn out the lights, and stake out with a bucket of water balloons... You know, for those kids who get the bright idea of "they aren't home, they'll never catch us tp'ing/hotdog-in-condoms/egging their house"...
A little bit of food coloring in the water balloons makes it instantly obvious they where doing something wrong; then they get to deal with their parents going "what did you do to your cloths!" lol...