I have no personal knowledge of the recent events at Wikimania, and I will speak about only the general principles involved.


True.  But for privacy and other reasons, it is impractical to make friendly-space violations a matter of public debate,

Please provide evidence that backs up that point. I have repeatedly seen similar assertions made by WMF staff with no data or analysis to support it.
 
so we cannot resolve this the wiki way.  Instead, we *have* to trust the people entrusted with enforcing the policy that they are careful, sensible, and competent.

I wholeheartedly disagree. I don't trust judges to put people in jail simply because they happen to be judges. I trust judges to put people in jail after the publication of convincing evidence and reasoning to support their intended course of action.

The standard of evidence required to remove someone from office, or remove them from an event, can be lower than the standard required to put someone in jail, but I still want mostly transparent due process to happen so that:

1. people who allege that misconduct has taken place have significant visibility into how their complaints are handled and thus, hopefully, can have confidence that the accusations are investigated in a responsible manner instead of being carelessly dismissed, and
2. people are not victimized with clearly false or poorly supported accusations that the authorities recklessly use as a basis for issuing sanctions instead of conducting a responsible investigation.

Pine
( https://meta.wikimedia.org/wiki/User:Pine )