At this point I expect white people will be excluded from all juries by default. It is routinely argued that the mere presence of a white on a trial for a black person is an act of racism and invalidates the verdict.

There's also the case of people spotting the same jurors on repeat trials in succession, which isn't even supposed to be possible. With the right people in place it must be trivially easy to get professional jurors on a trial and buy a verdict.