I would like to also add (regarding 815 specifically). The error code popup is horrendously designed as it will constantly spam you with just the generic 815 message if you have any auto chat enabled at all. The dialogue box can also overlap itself multiple times which leads to weird interactions if you're out in the field (will cancel attacks / skills etc for multiple seconds or longer at a time).
The error code also lists no duration; lists no reason; and lists no explanation of whatever it is or does. It also doesnt tell you whatever the offending SA or statements were; so it isnt really possible to divine what the system / person / or GM found fault with. (Assuming the content is more nebulous and not directly like, 'heres a picture of a dick')
And I am pretty sure you can acquire a chat ban by just having multiple people report you (assuming an alliance doesnt like you; or you can get multiple friends to report someone; the system will just auto flag with enough reports it seems).
Ironically enough; doesnt seem to happen to the meseta bot spammers at all. ¯_(ツ)_/¯