Fashion Week crasher Peter Gianquinto, whose pal talked the two of them into the front row of Gwen Stefani‘s L.A.M.B show by claiming to be Matt Damon‘s rep, has quite a name for himself. According to press reports, a man named Peter Gianquinto was busted for fraud for posing as Elton John‘s manager in order to get tickets to a dinner at the Four Seasons, and also posed as a rep for the Rolling Stones. It’s even been reported he was questioned about links to murderous DC sniper John Muhammad. Dylan Bernstein, son of legend ary Beatles promoter Sid Bernstein, told us, “In the early ’90s, we found out that Gianquinto was using my name as a way to obtain tickets and backstage passes to concerts and events.” Dylan added, “He befriended himself to our family as ‘Peter Mellon’ of the Mellon banking family.” He added, “It is ironic that Peter used Matt Damon’s name when Peter himself reminds me of a harmless ‘Talented Mr. Ripley.’ ” Gianquinto couldn’t be reached for comment.