Stolen bikes

jesus. what exactly do the gendarmes require in order to go round to this misserable little scrotes gaffe and clap him in irons? what is gumtrees policy regarding this sort of thing?
I gather they're happy to cooperate with police when requested - supplying what info they have including email address and IP address. However I'm sure you see how easy it is to place an add with an untraceable ip and email these days. Getting a correct physical address based on phone/email/ip can be difficult/impossible.