WATCH: Why the #FaceTimePrank is unacceptable and cruel

Cyberbullying is unacceptable and shouldn't be tolerated, even when it’s dressed up as a "funny" prank.

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The #FaceTimePrank, a new trend on TikTok, sees parents sharing videos of their children’s reactions when shown photos of people who look different to them. According to Indy100, the prank is meant to prompt a comical response from the kids, but it has been slammed for being insensitive.

In these videos, it’s clear the punchline is that the person has a disability and looks 'different', and it goes without saying, this is ableist and concerning.

In a now viral video, disability campaigner Lizzie Velásquez, who was once named the “world’s ugliest woman” because of her rare congenital diseases, has explained why it needs to end, in a TikTok video of her own.

By Wednesday morning, Velásquez’s video was retweeted more than 260,000 times and viewed by more than 12-million Twitter users. Many users thanked her for sharing such an important message.

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“This trend where you are pretending to FaceTime someone who is disabled or is a baby or there’s some crazy mugshot and you’re showing it to someone to get their reaction and say ‘Oh hey, talk to this person’, just to get a quick laugh – this is not a joke”.

“Everything that these kids need to know about having empathy and being kind to one another starts at home. This is not ok."

She pleads with people on social media, especially TikTok, to be better examples for children. “If you are an adult who has a young human in his life, please do not teach them that being scared of someone who doesn’t look like them is ok," she says in the video.

She also encourages parents to teach their children kindness and tolerance towards people who society deems 'different' because of their physical features or disabilities.