Aryo,
I see a debate, coming lol.
I have been followed home, I have had places were I have gone more than once where I get a flat tire on my vehicle after leaving, my computer monitors in which I use to evaluate evidence, suspiciously crack when I am not there. Do I define that as evil, no. I just consider my job not done.
That is where investigating comes to play, how is it possible to have any idea of what you are dealing with, without doing due diligence by interviews, evaluating history and claims, then backing it up with tangible evidence?
Words are just that, and honor will only carry those words into actual proof with that evidence or it is just a suspicion, a thought a biased opinion.
Again, I have not met any demons, I have not been possessed, nor do I believe I will in my lifetime. Does that mean there are not demons? Does that mean that I will not be possessed or attacked by a malevolent spirit, simply put no it doesn't. Please do not assume that I am any less prepared to deal with any such situation for I am if necessary ( knowledge is power), but again, I do believe there may be some cases of demons attacking humans, but the true occurrences are very few and far between.
I believe the power of the mind, the power of manipulating energy around you with thought alone ( in the sense of protection, and attraction)
I believe there are other dimensions and other planes, but for something or someone to cross that is when the two mesh for a brief period of time. I believe people are becoming more in tuned with the world around them, and not just in the physical sense in a energy way as well.