That *is* bad, Mirjam. Postal workers are not supposed to go through your mail, even if it isn't a private letter.... it is still your private mail.
I have had occasional envelopes in my Post Office box that are not sealed. The first time I noticed it I was angry and thought someone in the Post Office had opened it, until I took a closer look and could see that the sender hadn't even tried to seal the envelope, then I was not thrilled with the sender (it was a bill, and shouldn't be left open so that anyone *could* look inside if they wanted to). But in your case, for the outside bag the magazine was supposed to be sealed in to be blatantly removed and your magazine dog-earred like that... that outright shows that someone deliberately opened it and looked through it. :o/
Gemini