I think a voice chat option would allow for a greater inclusiveness and activity among certain segments of the Tower outside of events. It would also allow for the possibility of things like an actual Tower WoW guild, with voice servers and all.
Indeed. There's almost never just two people in a voice chat.
I don't think we'd be any more likely to need to moderate voice chat than we are to need to moderate our RL gatherings.
That said, I think the voice channel would need to be something that is free of the "no profanity" rule, for...
You don't have to read up on anything. It's there to provide context for the current conversation, and the ability to look back and see if someone has been a massive tool.
After looking at Erin's links (and using it myself), I am firmly convinced Discord would be the single best option.
Also...