Sure! Like they said, it just felt good to do something that they felt the police couldn’t control or understand. From OP’s perspective, they needed to be able to exercise control over those that were controlling OP. Easy to understand.

That said, the police and Stasi are (given the time) tasked with prosecuting and attacking far more than what OP could have known about, and given the relatively playful nature of children in even some of the most dire circumstances, the police and Stasi didn’t have limitless resources to chase down something that, over time, produced no significant threat.

Both the police and the Stasi were wary and paranoid, but even they have their limits, and they weren’t completely stupid. They knew they had to devote their resources to far likelier threats.

As OP said, she wanted to feel in control, and no one can really blame them. OP felt good, and that’s what matters.