Actually I had a sim that wasn't kleptomatic and he had the option to rumage through his neighbors trash can. I just clicked on the can and the option to rummage came up. He wasn't kleptomatic or a slob or anything but I forget what his excat traits were.
Yes, you can use the rummage action to find dirt on people, in order to write reports for the Law enforcement career, they implemented some of the careers very well in the third installment of The Sims. :P
There are traits that will allow you to do this besides Klepto. Maybe ven combinations allow this. There are probably lots of things that we miss because we aren't using the right triats or even combinations....
I haven't had rummage but as part of becoming the evil emperor I had to go meet some guy who's bath was outside (?!?!?!?!?!?!?) and an out house (lol) it was too late and on her own my sim went over and knocked over his trash for no reason. She has the neat trait.
I heard there were ways to get these interactions... but I have been unable to figure them out.
Any Sim can rummage trash cans. Walk your Sim on the sidewalk close to the victim trash can and walk onto the lot by using 'go here'. Dont ring the doorbell to visit them. When you're on their lot you can click on the trash can.
I believe all sims can rummage. My sim is a criminal and has none of the klepto or slob traits and she rummages for profit. She's made about 20k simoleans from rummaging. I can even tell you who has the best trash if you like.
I know the law Enforcement can do it and to get ahead you should do it.
Insane sims are fun to play!!!!!!!!!!!! Not to change the subject but they do some pretty funny things. They talk to them selves all the time mine is insane and a klepto.
She goes swimming and sleeps, works in clothing she shouldn't. The only time I saw her ware what she should was when she was pregnant.
It goes with your careers. At lvl 3 in Journalism and something else in Law, you can rummage and write reports on the "dirt" you find on your neighbors, which heightens your job performance.
Winning the Game
Don't be absurd. This is a Maxis game! What's to win? You and your sims can play unto perpetuity, getting into entanglements and trying to get out, and by the time you know it, it will be 3am your time, and you don't even have your teeth brushed...
--The Sims 1 Prima Guide