Anyway, I'm afraid that curbing internet won't be a complete solution since it's easy enough to tether off a phone or connect to an Xfinity hotspot.
A potential solution to this problem would be to make useable power outlets scarce. Some laptops can last a full day without a charge, but you'll find that most people will need to plug in at some point if they're working for extended periods of time. Not a perfect solution since it can be thwarted by external battery power banks.