Tobbe Lock picking bad idea? My arse. With enough skill you can even create a key by lockpicking it.
All you need is some time once... If you don't know what you are looking for you won't notice a picked lock and if you are good at lockpicking, you won't notice either.
Talking about stupid ideas, muh give you some legal advice: Never, ever, give parents of underage children, any ideas on this website. I just have to get that out before we actually have such a case here.