It brings in lower level, negative energy. These entities could be murderers and you're inviting them into your home.
There has been a lot of activity in this place. I mean, the owners have been woken up by voices saying 'Hey,' and a blowing sensation in their faces.
Sometimes it's the waiting game. It may not happen the first time. If that entity or being doesn't want to leave or want us to be there, then it may not reveal itself.
As a group, we think they are signs of energy.