one day your dog gets lost and you decide to call the police
or: one day your "in-law" comes rampaging at your house and you have to call the police
so the police comes, they look around and see you have flashcarts on the table. instead helping you, you get arrested.
or you did something wrong, and because the cop is on a bad mood they add "flashcart possesion and drugs" into the list..
enough of trying to be funny story. what i mean is.
there is a difference in being allowed and doing it...
the truth is, no one will care about that shit, that you own backups of your games or not, arrest someone because owning illegal copies of movies\music etc is really really rare.. (unless you sell them)
because every single person that owns a computer does it, or at some point did it indirectly.. (your niece tried to download a game on your computer..)
but if you do something bad to someone or are targeted.. this kind of stuff can contribute to your penalty..