I'm pretty sure spamming the server with symbol art wont kick people off the server or generate the amount of lag it would have done back on the PSU Demo servers for Xbox 360. if you try it on the JP servers. You get black listed by the players and if you try to report them. Most likely you will get banned for trying to report them. That's just how SEGA of Japan works in regards to what goes on in the servers. Symbol Art isn't the only thing you can get banned for when trying to report someone on the JP servers.
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