Don't Hack!!! said:trust me this plan doesnt backfire. First of all the dad doesnt know for sure so why would he punish without good evidence. If he does thats just moraly wrong.
But what if the kids don't give in? Guilt isn't powerful to alot of people, especially those raised in un-ethical households. Alot of kids survive on lying, and carry that all the way into adult hood. If they never confess, they never get punished...and eventually they will figure it out.