Yes, a children’s card game can stir emotions, just like any children’s game in general. However, when these emotions cause negativity, a line has to be drawn. In the case of Yu-gi-oh, that line was drawn when D20 Games closed the adult Yu-Gi-Oh circuit.
They explain it in their post, but go read this comment which shows just how aggressive Yu-gi-oh players can get.
Definitely, a children’s card game is not a game and not something to mess with. At all.