A grab followed by a retal, is land trading to me. Whether it was organized or agreed upon is irrelevant - both sides gained land.

For example, Rockman getting grabbed by Evo, then him retalling is land trading, even though Rockman never agreed to be a participant and was an unwilling participant.

To be more specific, the act of gaining land via ghost acres is what defines land trading to me - the process of exchanging land to generate ghost acres. (So bottomfeeding is not land trading because there is no retal.)