No, it is not okay to knock on someone's door at 3 AM on any morning and then run off. This behavior can be disruptive, intrusive, and potentially frightening for the person whose door you're knocking on. People typically expect to have their privacy respected during late hours, especially during the night when they are likely to be asleep.
Such actions can cause unnecessary stress, anxiety, and even fear in the person you're targeting, and it may lead to misunderstandings or conflicts. If there is an emergency or a valid reason to contact someone during the night, it's essential to do so in a respectful and appropriate manner.
Respecting other people's boundaries and personal space is an essential aspect of healthy social interactions. If you need to communicate with someone, try to find an appropriate time during the day or early evening to reach out. If there is an emergency situation, consider contacting appropriate emergency services or authorities who can handle the situation professionally and responsibly.