BTW, I'm no fan of the Warrens whatsoever. I think they exhibited and promoted an unhealthy curiosity about the occult, and have probably caused more people to get ensnared in it than they helped get out of it. Except for very rare occasions, the Church has always avoid publicizing a lot of detail about Exorcisms and the occult. It's very unhealthy for Catholics to spend any time thinking about it. We absolutely know (by faith) that they are all around us trying to destroy and ensnare. But that does not mean we should be focused on them. We turn our gaze rather to God and Our Blessed Mother.
Like the analogy from St. Frances de Sales, the demons are like barking dogs on a leash that is held by God. Their barking is intended to agitate and frighten us, but they advise that we igore them and turn to God and Our Blessed Mother for comfort and protection, but to ignore the demons themselves. They can do absolutely nothing of their own volition. But if out of curiosity we approach the dog, THAT is when we ca get bitten and mauled.
I recall an old Tom & Jerry cartoon episode. Tom (the cat) keep harrassing this dog Butch. Butch was on a leash and could only go so far. At one point, Tom went over and drew a line in the sand to indicate how far the leash could go. So he would walk right up to the line, antagonize the dog so that it came out barking and would then stand there beating the dog with a baseball bat and other things, safely on the other side of the line, smugly thinking he couldn't be hurt. Well, at one point, Butch wised up to this. So he secretly erased the original line and drew a new one that was closer and within the reach of his leash. Next time Tom tried the stunt, the dog immediately pounce on him and mauled him ... much to Tom's surpise and shock. That is what all this reminds me of. By engaging demons, getting too close to them or preoccupied with them, we are putting ourselves at great risk, and it can cause us to lose our peace of soul. I've known some people who were so "tuned to" the presence of demons that it deeply disturbed their peace and IMO made them more susceptible to opening the door to demonic activity that is otherwise held closed by God. I agree with the Dimond Brothers when they say that the reason that demons cause various disturbances and things like hauntings, is precisely to get the people to engage with them and thus open the door to greater interference and involvement in their affairs.