Many times I've seen Tasfast or Vortex Air planes taxiing along the apron at speeds I thought were unsafe. There are four flying schools with many inexperienced student pilots using the same apron, as well as two fuel depots. It's just think it's not a good combination.
Other charter operators I've seen around the country seem to keep a tighter rein on (junior) pilots and it's left me with a poor opinion.