In general it's best not to make eye contact with people on the subway. If you do you're just inviting trouble. Once you make eye contact it's pretty much an open invitation for the other person to approach you if they feel like it. At the very least you'll be freaking out the other person, because they are also thinking "don't make eye contact."
This is definitely not the type of person I'd want to make eye contact with. His mask is scary enough, but what's even more terrifying is not knowing what's underneath the mask. It could be even worse. I have to give props to the girl sitting next to him though. She must be an experienced subway rider because she is unphased. She might also be texting for help. That's also likely.