This appears to be the primary concern raised in the article. But surely data scientists could put in guards against this, such as weighting the crime count versus the time spent policing the area? In fact, presumably any functional predictive policing system must already do that, else you'd just tend towards policing one area incredibly intensively.
If they are concerned about the police arrest stats or racism biasing the data set, they could keep the input to something hard to interfere with, like where murders occur or where crimes are reported by the public, rather than where arrests occur.
My opinion is that predictive policing does need regulation, but banning it entirely, to me, seems like an overreaction that will over time result in much less effective use of police resources. I suppose time will tell.