Well, it's the first time I see this in the game. One guy was using my nickname, he came in, said some things in Spanish and left, then came back as chrstgtr and then we played a 3v3 match with two chrstgtr. Mapkoc explained to me that this can be done via ip, so I get it, but he asked me to post this in the forum anyway.
print: https://postimg.org/image/ggnpt0e4j/