So as it turns out, OpenWRT and other manufacturers support USB tethering for a smartphone. This would allow laptops to access the internet via ethernet, and therefore avoiding breaking the rule. Android phones can also be connected this way, but requires an ethernet to USB OTG adapter, and android marshmellow or above.
EDIT: Why was this inappropriate
And for people who USB tether directly to laptop, this lets you split into ethernet to share between laptops/computers