First of all, it's not that big of a problem. While our list looks long and scary, there are around 1,000 exit relays, so the chance of selecting a bad one in your circuit is not high. Furthermore, Tor's path selection algorithm is weighted by a relay's bandwidth for load balancing (one of the many performance/anonymity trade-offs). Many of the fastest relays of the network are run by well-respected people and organisations such as the CCC. Also, the Tor Project "removes" malicious relays from the network (see Section 1.1 in the paper).

Finally, we published our scanner for a good reason: to crowd-source the hunt for more malicious relays :)