Isaiah 45:7: 
I form the light, and create darkness: I make peace, and create evil: I the LORD do all these things.


It is clearly state in the bible that He alone create all things that is good and all things that is evil. So I personally think it is wrong for people to said oh no The devil attack me or whatsoever. When people give the example of Job as aid to their argument, they didn't realize that the devil only act with God consent like what happened in Job. Job only under attacked when God give permission. So rather than said some spirit attack me or things similar to it, I think it is better to take any bad situation(bad things that happened to you) as challenge from God and ask for His help and see that if you done anything wrong to deserve bad things happened to you. Sometimes bad things happened to us as a warning from God, if you keep blaming the other spirit for bad situation you be like pushing responsibility. It is like saying one didn't deserve a beating when one's broke a glasses. It is easier to said this and that cause this then admit your mistake and change your ways or improve yourself. 


I know people who think that when one's angry/sad it is because that the spirit of anger enter that's person and then start praying to cast out the spirit of anger. In my opinion it is not wrong to pray but one must realize that it is absurd to blame everything on evil spirit. If that fellow get angry for no reason then maybe you can pray to cast out the spirit of anger. But if you done something to provoke that person then it is you who cause his anger not some spirit.If I were to tore a person book intentionally and he get angry is it that the spirit of anger enter that person or is it that I cause his/her anger?
I think people should stop blaming everything on the evil spirit. When things go wrong, they need to take responsibility, think of a solution and act and pray for help not just praying to cast spirit and do nothing.
If I am wrong please anyone correct me