As far as the fear of speaking to lower entities go, I think it's fairly simple. If you find yourself asking for egotistical things, things that you want that have little to do with development than you might be dealing with the wrong crowd. If you feel the desire to cut yourself off from friends and they(spirits) aren't teaching you to be open and loving and forgiving, then it's the wrong crowd.
It's said that angels carry a very light heart. They aren't naive, so they also won't want you to be blindly happy. It's mostly inner work stuff that they'll bring to light. For instance, I realized today that I always think the worst of people. It was hard seeing that in myself because my ego wants to hold on and protect my selfish thinking. But in my heart I know it's something that has to go. As far as I can tell, guides help you shed the weight you carry.
My dad has passed, and whenever I dream of him, he tells me to appreciate things more and to be less preachy. He's told me to go out and have fun and to not think of him as much because he'll always be there. I trust that because a lower entity would want you to hold onto that pain. Someone who loves you wants you to be happy and learn lessons with a free heart. They also want you to be an independent person and to trust yourself. I think the best thing to ask for guidance on is how to speak your truth free of anger and despair. Those feelings are very "me" emotions and cut you off from good things, but they often come up when you've lost your voice. They're means of control, in my opinion, trying to make up for something you lack in yourself.
So, that's all I have to say about that. I don't like spreading fear at all, and I hope to spread a sense of a level-headed approach.