I partially agree, partially disagree. Demons WILL exploit weaknesses in a person, definitely, **but that does not usually go as far as oppression, and rarely goes as far as possession. **To become possessed you really need to have endangered yourself by becoming involved in the occult or reading occult material, when you know better.
Different people can be exposed to demons in different ways. For example, a naive person who knows nothing about the occult and dabbles with a ouijia board for a few minutes is not likely to become possessed, because they aren’t really intentionally opening the door to demonic activity, but just acting out of curiosity. However, if I played with that board, I would definitely be implicitly inviting a demon because I KNOW that is an occult item.
As an aside, permit me to clarify what I mean by “giving permission” or “opening the door” to a demon. I don’t mean just the straight-out telling the demon, “Come into me, demon,” but this also includes implicit acceptance, such as reading occult material, getting into occult affairs, playing with occult items, or just plain living an evil life with no care for protection from evil.
Problems can also happen, as you said, from places or persons being oppressed, but that doesn’t usually oppress the person themselves, it just affects them when near that place or person.
Also, I definitely agree with you that demonic activity is very common in the world, I definitely agree with that, having seen some of it myself. The reason I am posting in this thread, however, is in response to Robert. I fully disagree that demons interfere with trivial things or cause deaths by natural accidents or in cars, etc.
**If he can provide some proof **to support his claim, I’ll gladly see what he can pull up.