Sounds like another episode of Paranormal Activities! lol
Seriously, though, I wish I could believe that spirits exist. Let me put it this way, if I were to ever experience such 'activities' or be presented with hard proof that spirits exist, it would compel me to become a christian again.
But here's the catch-22. If I am looking for the proof, then the spirits will never provide me with such proof, because why would they want me to go back? That's assuming their evil... if they are good spirits, they would want to convince to go back, yes?
Of course, such reasoning is simply nonsense, and falls in line with people rationalizing that the devil and demons will never bother people who don't believe because they have already accomplished their mission! It is no wonder that when one stops believing in spirits that suddenly everything simply 'goes away'. Didn't a poster earlier on say out loud to a spirit to leave because it was disturbing his wife? Could it be very much possible that his wife hearing those words triggered an internal response to believe the spirit would have complied? Who's to say spirits even understand english? If they do, they must be intelligent and hence should be able to freely and willfully communicate with us, instead of using cryptic methods. Hence, the reality is that they don't exist, at least in my opinion, and most 'activities' are simply either a fabrication of our mind, or non-sensical rationalization.
Other strong possibilities are carbon monoxide poisoning (resulting in hallucinations and 'hearing foot steps' and feeling cold), and small animals such as rodents picking up small clothing items and carrying them up to the attic.
Hope this helps!