The ones that were already there didn't cause trouble... they just manifested in 3d or nearly so so I could see them.. when they would flash in. He loaded my apt with energy/loosh for those ETs to work with to manifest.
I have had them manifest though before on various occasions in the past via through my own 'influence production'. But those who are like us, know that such abilities are an on and off thing and come in waves that may last for even months at a time before it weakens again.