I've discovered a foolproof way for you and your friends to get away with doing unscrupulous things without getting caught! Just make sure you NEVER refer to the deliberative process leading up to the actual nefarious deed(s) as "hatching a plot". When plots are hatched, the events which ensue are automatically doomed to failure. Just call the planning process "doing the laundry" or something, and everything will go perfectly.
Also, make sure you don't claim afterwards that everything "went off without a hitch". That's a sure-fire way to guarantee that some moron left their wallet at the scene of the crime.