Calling "victim blaming" is not a retort.
There is nothing wrong with dividing up blame among both people who offer a risky choice and people who make the risky decision to accept that choice, just because one of them suffered the downside of that risk. There are a lot of other examples where if you screw something up you might get hurt, and the victim is definitely at fault. It's a spectrum, as someone else put it.
Sending your government ID over the Internet is a very risky decision, given the number and frequency of data breaches. The people who got burned here are not totally at fault but they share at least a little responsibility.
If Discord says they delete the PII they collect and they ultimately fail to do that, whether by malice or negligence Discord owns 100% of the blame.
If I get drunk and drive the wrong way down the highway and cause a wreck, the blame is not shared because the victim was driving a vehicle which is known to be a risky activity. I am culpable, full stop.
I hope we agree that there's a spectrum, and sometimes the victim is the one at fault. We just have to disagree about this specific case. I'm OK with that. All the best.