updated by @rene: 07/03/17 05:09:28AM
Let's start with the last one first: Death is a grand illusion. You never really die. It's all actually life just in different dimensions. You are a multi faceted being that exists on many levels all at once because time, it's just another dimension, doesn't really exist either. Spirits in the form that you are describing have the same God given choices that you do, in that, they also have freedom of will and can wonder all they like until they are ready for the next challenge or level or whatever you feel works for you. You are a universe all of your own growing with in the confines of the outer universe that we are all now sharing. But you can create whatever works for you in your own space.
Do they fear each other? They are attracted to like energies just as you are and repelled by unhealthy energies just like you are.
They may choose to be lonely if that is what they want or need but they will never be left alone unless they make that conscious choice.
And yes, they communicate at or on levels that would seem impossible on our world. However the day will come where spirit and the physical universe will share many of these heightened abilities as man kind continues to evolve.
And finally, no question is stupid. We're all here to learn, create, and experience so you just keep on asking all of the questions you want!!!!!
When you say you worked in a lab was it a lab in a hospital? My guess here is that you are developing some early psychic medium abilities and some spirits on a higher level know that you can sense their presence. And like physical people they may feel an ability or energy coming off of you but they may not be sure if they are right or not. From what I've read, I have very little medium ability myself though I am intuitive and sometimes can sense presences, they are often surprised when you notice their presence because most of the people they encounter don't. When they do realize that you are aware of them they sometimes won't leave you alone because they often want you to get a message to a loved one that they are alright in their new state or something along those lines.
What kind of experiences do you have most often?
You're daughter is not to young to have an imaginary friend and certainly, don't let this scare you, not to young to have a friend who is of spirit and not of the physical world. Yes, it could be what most people call a ghost. It could be a child spirit that has befriended your daughter or it could be something a little darker. It sounds to me as if your neighborhood is one of older homes that have a definitely strong spiritual, ghost legacy. How close are you to any civil war battlefields?
I don't think you are crazy in anything here that you have mentioned as I have experienced many things that are very similar to what you have described. And finally, do you feel that these entities are trying to intimidate you? In my opinion it sounds more like they just want you to validate their presence but it's hard since I know very little of your experiences as a whole.