If I mail you a letter and you send a letter back, have I hacked your house? Let's say you don't respond, and I send my letter with a different return address a

If I mail you a letter and you send a letter back, have I hacked your house? Let's say you don't respond, and I send my letter with a different return address and then you respond. That's basically what is happening here. If you don't want people sending you letters, get rid of the mailbox. For tech, close your ports. If you don't want to send information out, stop responding to the letters (or packets).