How can I know, and convince others, that the entities speaking in a EVP I record aren't demons?

That is a good question. First, if a person is offended by EVP on religious grounds, then you are probably not going to convince them one way or another. Even some people, who believe in all sorts of New Age phenomena, become defensive when you try to tell them that the existence of EVP might mean that there is such a thing as survival of the Self after physical death. As such, we avoid discussing EVP with people who might be offended. (By the way, we know that there are many “stuck” or “earthbound” communicators, and that what they learned from their religion while in the physical is usually the reason they have been unable or afraid to “go to the light.” It is so important that we know what to expect when we cross over.)

It could be said that the first contacts across the veil were made by “dead people” reaching out to us. That is how most contacts are initiated today, and we believe that a lot of the instances of a ghost in someone’s home are actually a loved one trying to say hello. We like to point out that people around the world have been studying EVP for over fifty years, and to our knowledge, none of them have been harmed. Yes, there is the occasional angry person who yells at us, even cusses, but we can experience the same thing with people still in the flesh.

If you look at the messages people record, it is difficult to attribute anything sinister about them. If the communicators were demons, then would they be able to be so consistently loving and supportive, as we see in some cases?  If the communicators are really demons, then your religious leaders need to rethink what a demon is, because many people are learning to continue their relationship with loved ones who are now on the Other Side. This is an important form of grief management.

Some of the communicators may be nature spirits that have never “lived” in the physical. You could call these “Angels” or “guides” if you wish, but we have come to realize that none of the communicators fit the description of “demons.” On the other hand, people generally maintain their personalities when they cross over. If they were jerks here, they are probably going to be jerks there. The communicators in EVP are just people being themselves.

Finally, we try to explain to people that EVP is potentially a very important tool for studying the relationship of the physical to etheric border of reality. There simply are no other tools that are as reliable or readily available to researchers. When SCPRAI members conduct an EVP recording session, they are also conducting an experiment that, added to all of the other experiments, help us understand the nature of reality. Many SCPRAI members do not tell their coworkers, friends and neighbors that they work with EVP. The idea of talking to "dead people" and getting answers in recorders is simply too far past the "boggle point" for some, and in some communities, it is best to stay quiet about it. You will have to make such judgments yourself, for your own circumstances.