Ha I love it when the friends/neighbors take out the trash. I have even had them mop up puddles before. I always think "Wow thanks what a kind sim." It almost makes me think having my sim maintain a relationship with them seem worth while, almost.
Spoilers be below if you don't have or haven't played the Jungle Adventures pack. I would wrap them in a spoiler tag but can't yet...
One thing that happened the other day that was odd/funny. I just got the Jungle Adventures pack and used one of the totems to summon the skeleton servant. The servant cleaned up a bit and proceed to terrorize the whole family with it's "joke" (I don't get skeleton humor and neither did my sims). The when the family finally went to sleep it proceeded to eat the entire contents of the fridge (all the precooked meals). Which then fell onto the floor (because skeleton duh!) Then it would turn around complain about the mess, clean it up and proceed to do it again.
Honestly it was hilarious... but still frustrating.