How can we protect ourselves and stay safe on the light rail?

I can't stop thinking about the random stabbing which happened recently on the light rail. Here's the Reddit post for it if you missed it.

I'm not a frequent light rail rider, but when heading to the airport it is so much cheaper than paying for an Uber or paying to park nearby. I'm not sure yet if I'm ready to just start doing that again, but I'm obviously considering it given the recent events. Can't put a price on your own life.

Does anybody have any advice for how to protect yourself and stay safe when taking the light rail?