I'll blog about that Luca. Great question. Stay tuned.
Also, you mentioned that you never received proof that they exist. It's like tuning your radio to their frequency. Here you have all these people telling you they are hearing from their guides and you are like, "What guides? Where? Show me?" to which they say, "Dude, turn on your radio and you'll hear them." to which you reply, "What's a radio?"
You aren't going to see them if you're not looking. You aren't going to hear them if you're not listening. Before you decide they aren't there, at least buy a radio and tune in.