The pair accepted they would have to fly home after the swimming competition finished in London in the wake of their controversial photo posing with firearms in a United States gun shop.
D'Arcy and Monk on Monday met Swimming Australia (SA) officials who backed the Australian Olympic Commission's (AOC) tough-line stance to cut short their Games stay.
SA chief executive Kevin Neil branded the photos inappropriate and said it was a poor decision to post them on Facebook and Twitter.
"They showed poor judgment in posting what we saw as inappropriate photos, in which they appear to be skylarking with guns while in the US last week," Neil said.
"While what the boys did was not illegal, posting the photos on social networks encourages public debate, and that debate can be seen to have a negative impact on the image of the sport and their own image."
While fellow swimmer Eamon Sullivan has defended the pair and led claims of hypocrisy, as an AIS swim squad enjoyed a team-bonding day at a Canberra rifle-range in 2007, SA indicated D'Arcy and Monk should have known better.
Neither is new to controversy with D'Arcy kicked off the 2008 Olympic team after assaulting former swimmer Simon Cowley in a bar and then declaring himself bankrupt last year when a court ordered him to pay $370,000 in costs.
Monk last year avoided charges after making up a story he was a victim of a hit-and-run before later confessing he fell off his skateboard.
"This matter involving Nick and Kenrick was not about visiting a gun shop, more the manner in which they posed in the photos, as well as past indiscretions which bring their actions into question," SAL said in a statement.
Both briefly appeared before the media on Monday afternoon, saying they would stay off social media sites before and during the Games.
D'Arcy, who didn't take questions in a 60-second statement, said it would be his last media conference before competition.
"I think at this stage it (social media) will just serve as a distraction and I think it's really important in these last seven weeks to focus on your swimming and what you're doing in the pool," said the 200m butterfly medal hope.
"At the end of the day, I'll be coming up against some of the greatest swimmers in the world - especially Michael Phelps - and, if you're not on your game, you don't stand a chance against those guys."
Monk said he could put the controversy behind him to perform at his best in the 4x200m relay.
"That's all that's my mindset at the moment - swimming fast and doing the best for my country and getting out there and trying to win a medal," he said.
Monk admitted he'd been hopeful he could have the AOC sanctions reduced but dodged questions about whether he felt harshly treated.
"To us, it was just a bit of fun and team bonding with the boys," he said.