I am sorry for your friend's passing. It seems like there was more than just remote viewing which could've lead to these events, but that's the tricky part of an outsider giving feedback to your personal situation. I feel like if there are dangers its psychological and can manifest itself in the body through stress or bodily reactions. So there's a point in which messing with the paranormal isn't a good idea, but I feel like remote viewing in itself isn't dangerous. How someone reacts to the information and deals with it can be a different story, though.