I'd venture that the main problem is that it requires care to run, you can't just toss stuff in, and you really can't have foolish teenagers deliberately putting a load all on one side to 'see what happens'.
The load would need to be balanced unless it had impractically massive shielding or some kind of auto-balancing system. Without those, the centrifuge would create a big hazard to itself and anyone nearby.
With some care you can sprag the lid switch so they run with the lid open, and then toss things in when it's going at the 20,000RPM or whatever speed they get up to.
If you can get the insides really clean, you can juice about 60 oranges at once.
The load would need to be balanced unless it had impractically massive shielding or some kind of auto-balancing system. Without those, the centrifuge would create a big hazard to itself and anyone nearby.
That said, I want one!