If you want to steal car, where do you go? To the a parking lot where there are lots of cars? Or to Petaling Street where there is not many cars around?

Same thing.. CC computers are easily accessible to a lot of ppl, a lot of information gets keyed in on those PCs, so obviously hackers will target those areas as well..

Like why Mac does not have many virus? Because Macs users are so few that hackers rarely bother.