Do you think believing in ghosts or/and the afterlife could totally ruin people's lives for sure if little children were involved in that?

No, Ghosts only have the influence one allows them to have in one's life. Understanding that "this" is not the first nor the last we will exist should motivate others to live the best life they can in anticipation of the next.

I do for I was married to a women that could see these Foul Spirits that Satan leaves to bring Sin.....women and men.....with oil and water I found you can remove them if you think you have one in your house by scattering the water commanding them to leave in the name of Jesus Christ ..... you can get this Holy Water from any clear running stream using the name of Christ.....God's Holy Spirit is in the water and to prove this Jesus walked on the water.....I anoint myself when I do this for number of reasons...you can put a cross in a room where you think they dwell in.....This may sound like garbage talk but you want to live with Foul Spirits be my guest.....they do not live in every house and I think one has to die in the house to be there but that is a guess.....Remember they either haunt of burn so what would you do if you were in their shoes.....I can tell you the Spirit world around us we really do not know much about and it is the children they bother so you have a sinning kid you might have one in your house.....they cannot harm you but can make you do things that are sinful like eat till your so fat you can't move....uses our emotions to do wrong.....and then we have them imprison souls in houses of people let say was murdered or were killed before the Death Angle is suppose to come and I guess hide their soul.....for reasons I have no idea.....But that Holy Water will burn them and kick them out and will free that soul.....What the Name of Christ can do we just have touch and I love a good true worshiping church, especially one Christ will visit for when he walk in teh anointing can be so strong I cannot stand ......and rejoice after ward....