Words like "shut the fuck up" and "fuck off" are indeed punishable but you can't be muted for it when it's a one-time case, neither can you be reported for it.

[quote]Only report players for flaming if it's very offensive or repeatedly directed at you. One occurrence of flaming is not a serious offense and should be ignored[/quote]

As well as:
[quote=https://cit2.net/index.php?topic=166419.0]
#7: Flaming
Only report players for flaming if it's very offensive or repeatedly directed at you. One occurrence of flaming is not a serious offense and should be ignored. Don't complain about people using very low forms of insults. We have made /ignore feature for this kind of stuff if you're annoyed by it. [/quote]

However he used a racial slur which is mutable at a one-time occurance:
[quote=https://cit2.net/index.php?topic=323105.0]
Is there something that can still be muted?

Yes:
When players offend the dignity of other players, such as discriminative remarks (faggot, nigger, racial discrimination in general) or offending someone that isn't even in the game (relatives, parents, ...). These kind of insults must be reported in forum tho, as the complained player should still have the right to defend themselves,[/quote]


(TJ, here's some topics where they used that to invalidate punishments in case they will say it's not true:
https://cit2.net/index.php?topic=325871.msg4800403#msg4800403
https://cit2.net/index.php?topic=331607.0

Ask for permission to post the links if you want before you do, because I don't think it's allowed to post such links in your appeal, to prevent getting it denied by a salty PAM)