Where is the proof that WoodCollector is banned?
Take a look at his
profile page. His signature mentions that the WoodCollector account was banned here.
Where is the proof that these are his alts?
It's fairly obvious that he was in control of a few alts, as those were really the only people standing up for him, plus IIRC BadBear tagged at least one of them as a WoodCollector alt.
Has there ever been an instance of a bitcointalk admin violating the privacy of their users?
It was fairly obvious that those users were alts of WoodCollector. Users figured that out pretty quickly, plus the staff here have tools to find alt accounts of users as well. Don't really think that making his alt accounts public was violating their privacy, when so many people knew already.