The stars have spoken out for the 'LOLz not Trolls' campaign by young person's charity vInspired as part of its 'Do Something' initiative, launched after research found that a third of 14-18-year-olds have been trolled online in the last six months, with over a quarter (27%) facing 'regular' attacks.
Flack, who famously received death threats from One Direction fans over her relationship with Harry Styles, said: "If someone walked up to you in the street and said 'You fat ugly s**t', that wouldn't be cool, right?
"Why should trolling be any different? I pledge never to troll, why don't you join me?"
Also claiming to have received "disgusting" Twitter abuse is Goodger, who commented: "Going on TOWIE really brought me to the forefront of the public eye, which as a result caused people to constantly scrutinise me about what I wore, how I wore it and what I looked like in general, especially online.
"It was really hard not to let that stuff get to me and I can only imagine how it must feel if you are 14 and have your classmates saying things that are very personal and hurtful."
Franks, whose Hollyoaks character Esther Bloom recently attempted suicide over her bullying ordeal, said that the storyline line provided a "first-hand experience" of what young people being abused go through.
"Thankfully many instances of trolling aren't as severe but it's not an experience anyone should ever have to go through," she said.
"In the 21st century, bullying doesn't just stay in the playground, it follows you home to your computer and it's getting harder to escape being victimised. It's surprising how many young people don't realise that what they write is so hurtful and the impact they have on the recipient."
The Wanted added: "Through the years we have met a lot of fans, ranging from all ages around the world. It would be horrible to think that these young people are becoming the victims of trolling, or are even trolling themselves. We'd like to encourage people to sign up to the Do Something campaign [and] show that you can make a difference."
In addition to the celebrity support, displays of real-life trolling messages will be projected and written on the walls of the Waterloo IMAX underpass in London today (February 22) to promote the 'LOLz not Trolls' campaign.
Individuals can sign up to the 'Do Something' campaign and pledge their support through the official Facebook page.