Well just a few days ago I found out that my account of 7 years was just banned without a warning for a very obvious error on their part. Just hours before my account was banned I posted a list of ASNs (basically ISPs) connected to a non-discord server I had that looked like this:
22773 ASN-CXA-ALL-CCI-22773-RDC, US
5432 PROXIMUS-ISP-AS, BE
577 BACOM, CA
To someone who doesn't know what ASNs are, they would probably assume they are addresses. This is not personal information, and there's no way to tie this information to any individual.
I opened a ticket and the only reply I get is that the ban will not be reversed and that the account will be deleted in 14 days. I've tried posting on Twitter and they have selectively ignored me while replying to everyone else. Any submission I make on the subreddit gets instantly deleted.
Screenshots for proof.
https://pbs.twimg.com/media/F49XZ4zaEAA_7mR?format=png&name=small
https://pbs.twimg.com/media/F49XZ4zaEAErD3J?format=png&name=small
https://pbs.twimg.com/media/F49XtAiaEAMmDdK?format=png&name=900x900
This also isn't the first issue we've had with Discord. They threatened to delete my server a few years ago because 1 person said they were underage amongst thousands of lines of chat and we did not see it and ban them. They refused to tell us who it was so I had to spend hours looking through chat to find the offending user.
Think twice before you decide to base your business around Discord.