Earlier quoted context omitted.
I don't think it is, and yes I do. I'm well aware that crimes happen on BART, someone was murdered at my local station not long ago. But I don't think that 'lawless' is a good description, although many of my journeys take me to stereotypically sketchy stations or occur late at night. It's because of this subjectivity that I said I hoped the case would turn on a more rigorous definition.
A guy was murdered at your station recently and a girl was murdered randomly at another station less than a week ago. On the same system! And you think this is normal and not an indication of lawlessness? This is not normal! If there were murders regularly on systems outside of the US they would be national events. This is a good demonstration of how we got here.
BART is certainly more dangerous than other transit systems in other developed countries, because the US in general is more dangerous than other countries. Deplorable as this is, clusters in small sample sizes are often misleading as to statistical trends, and many of the people commenting here seem not to have first hand experience riding BART.