If posts are open, that means you can contribute there. If they are closed, then that's for a reason. 😉
The troll may still be arround. Keep contributing to the wiki as you would normally. Avoid, or rather refrain from mentioning the troll situation at all. Mentioning it causing a reaction, which leads to discussion, which leads to opinions, which leads to panic and chaos. So better avoid it. The MoM is working with global task forces like VSTF who are specialized in cleaning spam and dealing with trolls.
So please be calm, stay alert, do not engage, report and move on!
Mischief Managed.