I can provide some advice on what you should do in such a situation:
If you encounter a vehicle with its trunk or a door left ajar in a parking lot and there's nobody around, it's generally a good idea to take some responsible actions:
Assess the situation: If it appears that someone may have accidentally left the trunk or door open, and there are no obvious signs of suspicious activity, you might consider closing it to prevent any potential theft or damage to the vehicle.
Look for the owner: Take a moment to look around and see if you can locate the owner of the vehicle. They might be nearby and just out of sight.
Leave a note: If you can't find the owner, consider leaving a polite note on the vehicle, informing them that the trunk or door was left open and that you closed it to help keep their belongings safe.
Report it: If the parking lot has security personnel or surveillance cameras, you could inform them about the situation, so they can monitor the area and possibly contact the owner.
Do not touch personal belongings: While closing the trunk or door is generally considered helpful, avoid touching or tampering with any personal belongings inside the vehicle.
Use your judgment: If the situation feels suspicious or unsafe, it's best not to get involved personally. Instead, you might want to notify the appropriate authorities or security personnel.
Ultimately, it's essential to use your best judgment and consider the safety and security of the vehicle and its owner in such situations.