This might not be applicable to your situation since it sounds like more of a spam issue, but several of my colleagues who help with the hiring at their companies now require an "on-site" interview because of rampant cheating and misrepresentation by potential applicants.

The amusing thing is that the positions are still 100% remote - they just conduct the interviews at shared workspaces.

I've been flown out to SF for "remote" role interviews -- I thought it was common that even if the role is remote, you interview on site and might fly out for a brief training, receive your equipment, fill out HR paperwork etc is a reasonable ask assuming costs are covered.