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Pro S Only also known as PSO, Pro Skillers Only are a RuneScape clan. Unlike normal Runescape clans who check to see if you meet stats requirements, PSO instead check if you are telling the truth about your gender. Mainly through the use of your IP address and Email. This is as a result of their ginger leader showing his dick to a guy (thinking it was a girl) in the past and getting scammed for his RuneScape bank.
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