These are some of the first negative comments about Slater, who has become an Internet celebrity, complete with spoof posters and T-shirts. More than 180,000 people "like" a Facebook page dedicated to him.
His ex-wife says she doesn't blame her ex-husband for the "stylish" disembarkment.
"There's no doubt in my mind that this passenger had to have been pretty horrific," Cynthia Susanne told "Good Morning America" today. "I can't really say that I blame him."
Susanne defended Slater against passengers allegations that he started the ruckus on the plane.
"That's really difficult to believe," Susanne said. "He is a professional. He always has been."
Though investigators said inflating the emergency slide without warning could have been dangerous to ground crews below, Susanne said Slater did not have any "mal intent."
"His choice of exiting the plane that way was a very stylish sort of exit," she said. "But I don't think that he hurt anybody."
Susanne said she spoke to Slater's mother and both were "baffled by the explosion of media attention."
"We basically shared a few laughs over this kind of wild situation," Susanne said.
On Monday night Slater told reporters he too was surprised by all the attention his story had generated.
"I knew there was a brouhaha about this," he said. "But while I was on the inside I didn't realize how much attention it got." And he added that it feels "neat."
"It's been very, very appreciated," Slater told WABC-TV in New York. "It seems like something here has resonated with a few people."
Meanwhile, the 100 passengers on the flight received a $100 voucher good towards a future flight in the next year on the airline.
"As is consistent with our long-standing policies, JetBlue often provides vouchers to our customers when they experience a disruption or otherwise abnormal circumstance. This event falls into that category," spokesman Mateo Lleras told ABC News Tuesday.
On its blog, the airline added: "While we can't discuss the details of what is an ongoing investigation, plenty of others have already formed opinions on the matter. Like, the entire Internet. (The reason we're not commenting is that we respect the privacy of the individual. People can speak on their own behalf; we won't do it for them.)"
"While this episode may feed your inner Office Space," the airline added, "we just want to take this space to recognize our 2,100 fantastic, awesome and professional Inflight Crewmembers for delivering the JetBlue Experience you've come to expect of us."
Delta flight attendant Doug Slater is a friend of -- but not related to -- JetBlue's Steven Slater, and said he understands where his friend was coming from.
"Every flight attendant has had this frustration and has had the desire to do something like that that you would lose your job," he told ABC News Tuesday. "I think everyone has fantasized about that. The public can be challenging."
Slater has been charged with criminal mischief, reckless endangerment and criminal trespass.
ABC News' Andrea Canning, Desiree Adib, Sharde Miller, Jean Shin, Shimon Prokupecz and Dean Schabner contributed to this report.