Lol. :)
A) Its the principle of the thing.
B) I can get around the disposable email block with a disposable email quite easily. Its more the fact they got rid of the original account that pissed me off.
C) I change online screen names somewhat frequently to cut off the occasional mentally unstable person who tries to work around a service's block feature.
D) Discord makes a ton of privacy claims that are dishonest in the sense that they are actively trying to block anonymity which would allow those claims to be true.