Happy with the response. Thanks however in the unofficial rules book there were no such exclusion for a board so how a user suppose to know that Meta is excluded.
The rule says something about "...not conflicting with forum rules...",This could broadly include meta exemption.
As per description; meta board is for forum discussions (reporting malwares, appeals, suggestions etc) and as such it is counterproductive to exempt certain users from that discussion as it goes against free speech. So a local rule to censor a particular user in meta or other boards where self mod is disabled by default, like scam accusation, auction etc, would likey not be effected by the mods, as those boards usually require general contribution and for some like scam accusation, specific responses from the accused user.
However, regardless of the situation, I do not support the idea of banning specific users from replying to a thread, self moderated or not. This is usually done when;
• The user in question is constantly trolling the OP, or
• The OP is trying to troll the user.
For the first instance, it could be helpful to avoid multiple reports to the mods (although a troll can sometimes be very on topic and still censored). But in the second instance it could be abused by the said user, especially if the thread is somewhat about them.