For the crime of seeing an empty train carriage and going to sit directly next to her, when her expression makes it clear that she’s uncomfortable with that. If you want to sit and make conversation, sit across the aisle, make a comment that has either the option of being picked up for conversing, or politely dropped, so that you’re not pressuring someone into something they may not be comfortable with (talking with strangers).
For the crime of seeing an empty train carriage and going to sit directly next to her, when her expression makes it clear that she’s uncomfortable with that. If you want to sit and make conversation, sit across the aisle, make a comment that has either the option of being picked up for conversing, or politely dropped, so that you’re not pressuring someone into something they may not be comfortable with (talking with strangers).
In addition to being in her personal space, he’s also blocking her exit, which could make her feel trapped or threatened.
It’s good to discuss these things openly. I sympathize with people who don’t intuitively understand them, as I’m one of them.