someone on here to scam someone out of £200 wont think twice about paying a fiver to do so. having to lodge your personal details to place an advert would more likely discourage them, although you cant stop them PM'ing anyone, unless all replies to adverts were on a form sent to a central address with a reference number to the advert and then allocated to the user if seen fit by a moderator or through some other form of filter. thats the safest way, but also slowest and hardest to implement. the problem still remains though, you can never stop fraud, only discourage attempts to do it
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