No but TFA specifically mentioned hiring “grad students” as an example, and that could accidentally get them into hot water.

I’ve worked with foreign students and they have to be reminded that they can’t Uber or DoorDash or consult or basically do anything other than explicitly permitted work-study for income while they are here.

Pretty sure you can do yard work or shovel snow for someone one time and get paid like twenty dollars in cash. As far as I know, nobody gets in trouble for that.

It only becomes a problem when the entity paying tries to enter it as an expense.

All the usual disclaimers apply. I anal. I am definitely not YOUR lawyer.

What about “grad students” implies “foreigner”?

It implies "population most likely to include foreigners on restrictive visas"

I can’t imagine how you arrived at that conclusion, but perhaps there’s something I’m missing.

Well, generally speaking the one of most common kinds of visa that includes restrictions on working is visas for education (another common one is visas for temporary travel whether for business or pleasure, but while there may be more visas issued because people with these visas generally aren't staying, you are less likely to meet them or try to hire them), and it's common to travel for university-level education, more so for post-graduate education. So the largest population of foreigners which have restrictive visas is going to be post-graduates who are studying abroad. It's certainly the only situation where I have met someone who is legally in the country but I could not legally hire.