"When Mrs. Lohan stops partying with her child, then I'll have an ounce of respect for her," Schneider tells PEOPLE.
Dina Lohan criticized Leno and Schneider for "making light" of her daughter's woes after the actress was forced to cancel her spot on the Tonight Show following her arrest last week. Schneider, in a blond wig and little black dress (complete with mock alcohol monitoring ankle-bracelet), stepped up to the plate and answered Jay's questions when he took the star's spot in the hot seat.
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"Lindsay, get it together, America will forgive you but you gotta do something positive with your life," Schneider adds. "I hope she does okay but at a certain point, there's so many bigger problems in the world than Lindsay Lohan.
"I hope she gets her head out of her nice, cute little rear end and finds a life for herself," says the comic, currently filming with pal Adam Sandler on location in the Hamptons. "She's very talented, and a special little actress but there are so many people out there who'd trade positions with her in a heartbeat and use it better than she is."
He and Sandler had turned out to see Dave Matthews and Tim Reynolds playing the Hamptons Social @ Ross in East Hampton, N.Y., Saturday night. Mandy Moore, Billy Joel with wife Katie Lee, Edie Falco and Joan Allen were among the famous faces in attendance at the glitzy rock 'n' roll event.
Reporting by LESLEY MESSER