There's a man in Seattle who looks so much like Gary Busey that, when recognized, he often plays along and pretends to be Busey, even with people who have actually met and worked with the actor. This actually happened to one of my coworkers who swore she saw Gary Busey at Sub Pop's 20th anniversary party, an event mentioned in the Seattle Weekly piece.
That article's a little long and sporadically entertaining, but the slideshow is worth a look. The best part of the article itself is when someone calls out "Hey, Nick!" mistaking the fake Busey for Nick Nolte.