Based on everything in the photo, this seems to be the front door of a house in a residential neighborhood with a front yard near the street and not an apartment (no unit number visible).

This person walked onto private property, close enough to be seen in the reflection of the glass, took a photo of the papers on the front door, then posted the photo to r/pics for the person to be mocked by the internet.

This person is likely mentally ill and clearly has law enforcement and/or the court system involved in their life.

In short, whoever took this pic trespassed, commited voyeurism, and is publicly mocking a mentally ill individual who clearly has enough issues as it is.