This is my own opinion about bad spirits and good spirits.
Is there a danger of contacting evil spirits whilst working mediumistically? There is only danger when the medium is not experienced and is not in control. The medium must be in control at all times. Nothing should take place that the medium is not happy with.
To work with spirits you have to develop your psychic abilities to the highest degree. You have to ask for the highest and the truth at all times. And, above all, you have to work with spirit for the highest of reasons.
The highest reason is to help others. You help them by giving them proof of life after death, which you get from the spirit world. You have to treat spirit with the greatest of respect. It is not a game. It is not entertainment. It is serious work. That is not to say that you cannot be light hearted whilst giving the communication. You want to uplift not bring down. But do not belittle the spirits who come through.
By the same token, if a spirit was to get through and it was not nice in any way, then you must close down. Once you let a naughty spirit mess you about you are no longer in control and others may get through too.
If you are tuning in to spirit for a sincere reason, and you say an opening prayer asking for spirits love and protection, then you will be fine. Opening up your psychic centres will allow spirit to come through. Therefore, you must close them down again when you are finished with the communication. This is ALWAYS important. However devloped and experienced you are you still need the safety of closing down.
There are of course good and bad everywhere. Bad people die just as the good ones do. Make sure you are always in control and only accept what is good. You will never come to harm if you follow the rules.
I have been working for spirit over 30years now and have never had a bad spirit come through. Of course, not all spirits were perfect people on this earth plane. Of course they will still show you their personality when they come through. This is to prove who they are.
Evil is another thing altogether. Evil attracts evil and if you are a good person then you will not attract evil.
If you wish to discuss this further then please email me and I will do my best to help and guide you.