The ground stop system is not a bug that can be corrected by tricking the FAA ETMS (enhanced traffic management system) about your destination. Ground stops are a very cool technical innovation that reduces opreator costs and pilot/controller workload. If everyone filed to an airport near KIAH and then diverted to KIAH en route, then everyone would just be holding around KIAH and trading a ground stop for an en route hold.

What you're describing is akin to suggesting everyone should carry devices that pretend to be an emergency vehicle and change intersection lights to green as they drive so that nobody has to wait. The result would, of course, be everyone waiting more.