Let's hope there is no demon of run-on sentences and lack of punctuation. I think there is more likely a non-supernatural explanation for that one.
Casting out demons IS in the Bible. The idea of transferring spirits by the laying on of hands is NOT in the Bible. The Bible never teaches if someone lays hands on you that, you are at risk, spiritually. Though there are some examples of people being imprisoned after their imprisoners laid hands on them.
Casting out demons out of a demonized person is a legitimate ministry. The fact that some people will come to Jesus claiming to have done so, whether they have or have not done so, and will be rejected as workers of iniquity, doesn't do away with the fact that Jesus and His disciples cast out demons, or that Jesus told His disciples not to rebuke those casting out demons in His name, for those who are not against us are for us.
Casting out demons is not the cure all. If I dropped something on my foot, I don't think casting a demon of injured foot out of my foot would likely do any good. I could pray for the foot. And if someone is totally demonized and the demon is cast out, the person needs to repent, believe in Jesus, be filled with the Spirit, and walk worthy as a disciple. Casting the demon out doesn't cure all these things. Casting a demon out doesn't give the individual deep knowledge of the word of God or guaranteed victory over all temptation.
I agree that some people treat casting out demons like a cure all. But I don't see any Biblical basis for being afraid that if someone touches you, you might get a demon or for suspecting that those who cast out demons must be evil.
There is a warning to the one doing the laying on of hands not to be too hasty in the laying on of hands. Timothy was apparently appointing bishops and deacons. There was the laying on of hands for healing, and the laying on of hands related to separating or ordaining someone to ministry. The one who does this too hastily may share in the guilt of a leader who falls into error or sin.