Now - unsurprisingly - the situation has escalated, as it does whenever mobility is a function of privilege. In-person conferences in the US means not only no less-affluent countries and no global south, it means nobody who wants to risk spending a month in a cage because they objected to an ideology or a genocide on the internet or have an X on their passport or filled out a form wrong five years ago or or or.
We know what to do and how to do it, because we've done it before.