So what I learned from psychology class and also talking to a few recovered meth addicts, its the paranoia, which is a side effect of meth use. Every one of them have told me the same exact thing, "they were watching me" or "they were listening to me". Their reasoning was that they gutted everything that was not wood studs or sheetrock so they couldn't hear or see them. here is a scarier one for you, I had one recovered addict tell me they rewired all the electrical outlet and switches in the house they rented to stop them from watching and listening to them. I used to think the tenants pawned the copper wire and pipe for money, but no, that usually just gets hauled away by the homeless folks with the shopping carts. There is this kind of ecosystem within the drug infested neighborhoods. So as for the 2 am thing, drug addicts do not like light. I have been told it hurts their eyes. Drainage and sewage systems are warm and dark and the smell sensory system after prolonged use is dormant so the smell is not much of an issue for addicts. Crawl space foundations, I tore a house down once in the ghetto of Pittsburg, CA. We slid the roof off into the dumpster. We started pushing the house into the garbage dumpsters, kind of like sections of the house. All them meth heads come crawling out of the vents in the sides of the foundation.
