I watched a really scary movie about ghosts two nights ago and for the past two nights I've had to sleep with a dim light on in my bedroom. When I was younger, I used to get so freaked out at night, I would end up running into my parent's bedroom. Ask yourself this question - If they were so evil, wouldn't they have harmed you by now? Wouldn't they have reached out and touched you by now? Wouldn't they have said "OOGA-BOOGA-BOOGA!" by now? If they haven't chances are they either aren't there, or they're friendly ghosts.