Many people who are homeless in Portland are indeed alcoholics and/or drug addicts who at the same time, refuse to get themselves any help.
In your case, the person thought you were an alcoholic because you were outside. Don't worry, it's not your fault. People make impressions about others they refuse to understand just to feed their ignorance.
_________________
Silly NTs, I have Aspergers, and having Aspergers is gr-r-reat!