Our guides do warn us, if there is something that we really shouldn't be messing with, we get the warning signs, through some "gut instincts," others through emotions like unexplainable fear, bad vibes, and so on.
I was taking a short-cut through a forested park and a thought in my head said "Get out of here NOW." I walked straight and steady to my house and realized that I had been saving time at the risk of my personal safety. As to whether the danger was from beings on one side or the other of the veil, I didn't ask. I just got out of there, respecting the feeling sent to me.
I do appreciate Freda, although I haven't tried yet to start any dialogue with her. I am enjoying my research into Heathenism, but so much of what is written is either reconstructed from slender threads of information left from the old beliefs (of which there were many variants anyway) or new belief systems.