They're mining with our equipment and I can prove it.
Ok. I'm listening. I'm also accepting suggestion on how to prove that HF is mining with my machines, since that and i don't have many ideas other than issuing subpoenas to every possible supplier of HF. (public note: i'm not claiming HF to be mining with my machines).
Because they have already given us test results on the chips after a testing run a week ago.
You can't do a testing run and get a GH/s value unless your mining Bitcoins. Don't try telling me they're on a testnet with fake Bitcoins.
Any bitcoins produced during the testing phase should be sent to the customers. Those are our Bitcoins.