I've tried to join multiple times over different Tor circuits. Each time I've been stopped by the "Give us your phone number" nonsense, but each time it has shown me the channel name and details, how many people are online, etc. I'm not familiar with Discord, but it seems like I actually join the channel and then am immediately asked to verify? That would perhaps explain my name showing up in the room.

Edit: I got a glimpse of the channel that time before it kicked me out asking for a phone number, so it seems that I've written above is indeed the case. Shame we couldn't use something a bit more privacy respecting like Riot. I also won't be signing up if it requires a phone number or a clearnet connection.