Nearly all frack sites involve two types of landowner - the people who own surface rights and the people who own mineral rights. This doesn't address injection wells but that triangular ( surface, mineral and fracker ) relationship "regulates" things pretty well.

Since the film "Gasland", all manner of untrue things are flung at fracking. IMO, a grain of salt is in order.

The stuff down the hole is much more dangerous than the fracking process - there is (maybe) HS gas, possibly radioisotopes, pressure, other stuff. Fracking is simply a part of the completion process of drilling.