I too was contacted by a Dave - IP address 188.8.131.52 which is registered to a Dave Ryder in Redmond, WA and the IP is owned by Douglas Van Buren from Digital Island Inc in CA. I met him on a dating site called Bikersornot.com.
His profile is: Trooper from New South Wales, Australia. He is a scammer....BEWARE. Never sent him money or gave out personal info but the male/female (whatever it is) is a fake & conning women with his charm, education, intelligence & very attentive.
Then all of a sudden when he realizes you my be on to him....he ups & disappears & closes his acct on the dating sites. I have contacted the FBI and his job as he is using company property to play his games. This idiot must be stopped before he does serious damage to some poor unsuspecting female. I hate BS like this & it boils my blood. I know I plan on exposing him in a major way. Anyone reading this should do the same. People like him need to stopped. Thanks