Bingo, the root problem is pretending to have any quasi-judicial structure/authority at all.
People of roughly equal status issuing ‘judgements’ or ‘decisions’ on each other really doesn’t make sense for that reason, at best you can do so within a private club and its property lines.
A federation of private clubs may decide to do so, very rarely, only for the most serious cases, because as mentioned in the OP there’s always the risk of some clubs siding with the accused and then deciding to leave, splitting the federation.
Bingo, the root problem is pretending to have any quasi-judicial structure/authority at all.
People of roughly equal status issuing ‘judgements’ or ‘decisions’ on each other really doesn’t make sense for that reason, at best you can do so within a private club and its property lines.
A federation of private clubs may decide to do so, very rarely, only for the most serious cases, because as mentioned in the OP there’s always the risk of some clubs siding with the accused and then deciding to leave, splitting the federation.