The OK emoji – and photos of the hand signal – have been added to a list of hate symbols as a result of white supremacists falling for a prank…

The hand gesture of index finger and thumb forming a circle, while the remaining fingers are splayed out, has long been used a positive symbol. It is typically used to signal approval – ‘Ok’ or ‘perfect.’ Scuba divers also use it to check that all is good with their dive buddy and to confirm that it is.

But, reports the BBC, US anti-hate group the Anti-Defamation League (ADL) has now added the gesture to a list of ‘hate symbols,’ alongside things like the swastika.

The irony is that it all started as a prank.

The Anti-Defamation League started its “Hate on Display” list in 2000 with the aim of helping people recognise signs of extremism.

It now has over 200 entries, including the swastika and Ku Klux Klan’s burning cross.

“Even as extremists continue to use symbols that may be years or decades old, they regularly create new symbols, memes and slogans to express their hateful sentiments,” said ADL boss Jonathan Greenblatt.

“We believe law enforcement and the public needs to be fully informed about the meaning of these images, which can serve as a first warning sign to the presence of haters in a community or school.”

But it was white nationalists – a group not exactly noted for their intellectual prowess – who fell for it, adopting it as a ‘secret sign.’

The preposterous reasoning to be given was that in a hand making the OK sign, the three straight fingers make a “W” shape, while the closed thumb and forefinger symbolise the letter “P”.

The ADL does stress that we shouldn’t jump to conclusions when we see the OK emoji used. Most usage remains entirely innocent.

But because it is increasingly being used in this way, the group believes it’s important to flag it. The idea of the database is to help decode symbols which are being used in this way, as well as alerting people to innocent use of symbols which may give the wrong impression.