RG:  "Eugene police said the homeowner on Wednesday found the front door unlocked, and a stranger sleeping in a bedroom."  
 apparently i failed to convey irony and sarcasm in my comment - the whole lets switch places and look at it thing.....    no?  ok
    we had a house down the block tied up in court stuff and sat empty for over a year.  on a regular basis a neighbor would notice someone slowly go down the drive to the house and around the back.  then there would be stealth like coming and going until the cops rousted them out. a handyman would come and fix whatever was broken to gain entry, again. i don't know that they were addicts.  the first 2 people who squatted there where there for over a week - neighbor didn't know who they were and finally  her suspicions had her call the cops .  the intruders had gotten sleeping bags, what looked like a food box, and candles and were getting pretty comfy.
  so, yeah, i'm in agreement with this being not a good thing.