Crazy explanation :
Player, Nom, and Wyrm roam ETG.
Player and Wyrm decide to play versus each other using pvp duel. Wyrm thinks Player's in game name is Nom, so he searches for Nom. But Player knows Wyrm's ign is Wyrm, so Player searches for Wyrm.
Result : they connect. (tested)
Why is this bad?
Imagine Player and Wyrm, knowing each other's ign this time, are going to play a duel. They search for each other, but Nom being a troll, he decides to search for Wyrm. And he might connect to Wyrm and stop Player from playing Wyrm. (tested)