Why would they be careful, given that the chances of any serious consequences for ignoring such provisions are effectively zero?

Your cynicism is at odds with reality.

I got a check for nearly $500 because when I was an Illinois resident, one of the SV tech companies violated that law.

All it takes is one or two people to get in the ear of the right class action lawyer, and ignoring the rules quickly becomes expensive.

Or you could just grouse on HN and accomplish effectively zero.