His vibes were spot on, really. Elliot might have been physically capable of inflicting damage, but if you talked to him for ten seconds, you'd realize he was well below the threshold of 'bad guy' status. He certainly wasn't going to be giving any powerful speeches about his masterful plans any time soon.
"Oh, no, you don't!" he answered quickly. "I mean, obviously you do since I recognized you, but if I were to see you on the street, you know, I wouldn't associate you... with mad scientists..." His voice trailed off as he got to the end of his spiel. Chronic foot in mouth syndrome.
"Hi. Elliot Fisher. Nice to meet you. Laundry day?" Because, obviously, there was a possibility that he just wanted to hang out in the laundromat for fun.