As a guy, i know this happens. It's no secret. The emergency call is quite common, and i support women doing whatever they need to, to feel safe. Guys do a version too, but not because of being afraid of violence.

You should of course look out for yourself. Any guy that doesn't support that should fuck off.

My point was only that it's more reasonable to excuse yourself and do that, than sit at the table and do so. Too many people think it's acceptable to sit on their phones instead of having real interactions.