There really is no need - EXCEPT Austin is a liberal dictatorship demonated by the liberals in the University of Texas and the TX state government bureaucracies and the extremists in the Austin and county governments.
Thus, any free-market non-government-approved system like ride-sharing for - gasp! - money is hated and to-be-destroyed.
Yes, it apparently would cripple Uber if the government started filtering out the criminals. 5 rapes and 170 sexual assaults December 2012 to August 2015 by their own admission (numbers that may have been falsified by Uber. Unsanitized documents showed 5,827 reports of rape, not 5.) https://www.theguardian.com/technology/2016/mar/07/uber-hits-back-sexual-assault-complaints
That cutoff date probably wouldn't include the well-publicized case in Texas. http://www.dallasnews.com/news/metro/20150801-dallas-uber-disagree-on-whether-driver-accused-of-rape-was-licensed-to-drive.ece