someone who still keeps a picture of a popular person (actor, athlete, artist, etc) of which they were told they look-alike (or not) as their primary pic in their web profile, 3 weeks or more past Doppelganger Week.
Dude1: "I met this girl online who looks like Beyonce, but when we met in person after 2 weeks of chattung, Dude, I didn't see any trace of Beyonce in her, I don't get it."
Dude2: "Dude, haven't you heard of the Doppelganger Hangers !? They're rampant now. I learned my lesson this week after meeting somebody parading as Jodie Foster online. Just be careful from now on."