Discord already has enough data from their users and I would not want to verify my phone number. But because of that, I and probably many others can’t chat in Facepunch’s Discord server.
There are many other huge Discord servers that do not enforce such a strict security level and still are not (noticeably) raided or receive a lot of spam.
The Garry’s Mod Discord for instance also does not require a phone number, which makes it much more open. I think requiring phone verification is a bit paranoid or has there been an incident on Facepunch’s Discord server in the past that has caused this?